e-school introduction in the learning process is introducing in the same time new technology based on the access points (AP's) operating in the 2.4 and 5 GHz frequency range. This technology is in accordance with reccomentations and other regulatory issues, but in sense to provide epidemiological view on this matter, Institute for Medical Research and occupational healt is conducting activity to make contribution in the area of dosimetry if EM fields.
As recognised specialist in area of measurement and RF field simulation, I became a part of the IMROH team working in this project.
EM fields are measured by using of Narda SRM 3006 meter, and simulation by using of REMCOM WirelessInsite software.
Project start – January 2013
Project duration – 2 months
Project goal – existing GPS receivers are well designed to be used in the open areas. To be used in indoor condition by applying special systems for re radiation its compatibility is questionable. The project goal was to investigate the level of compatibility of standard GPS receivers in such situation.
Involvement in the project – personal involvement was related to perform requested compatibility analysis.
Project start – September 2012
Project duration – 3 months
Project goal – In order to be able to perform measurement in known environment regarding the electromagnetic fields (EMC), this project has the goal to design and realise the Transversal Electromagnetic cell (chamber). One of the objects to be tested in this cell is developed EM dosimeter.
Involvement in the project – design of the elements of the cell, verification of the design by using of EM FEKO simulation tool. Upon coordination in phase of realisation, measurement on finished TEM cell was performed to verify the cell behaviour.
Project start – June 2012
Project duration – 3 months
Project goal – GSM system as mobile communication system is additionally standardised by GSM-R (GSM Railway) standard. In order to enable requested communication parameters prediction of the quality of radio signal strength coverage was requested. After prediction of the coverage was done, verification of the prediction is necessary.
Involvement in the project – personal involvement was related to ensure sufficient good terrain elevation model input data, decide about optimal transmitter positions and perform the coverage prediction. Verification of the prediction was not done doe to changes in the overall plan.
Project start – August 2011
Project duration – 3 months
Project goal – System design of the RFID/GPS based solution intended for tracking and management of the radioactive material. Considering importance of the radioactive material issues, solution with special requirement in reliability and precision of location had to be defined. The location based solution covered both in and outdoor areas.
Involvement in the project – personal involvement was related to complete system design of the solution.
Project start – February 2012
Project duration – open
Project goal – according to the international regulatory agencies in the area of electromagnetic exposures the only persons who are in position to be exposed to the limit values of the electromagnetic fields are professional working in the area of near EM fields. Our knowledge of the mechanisms of the influence of EM fields to human body is not investigated enough and that lead us to necessity of recording much detailed data of that exposure. For that purpose we need adequate EM dosimeter.
Involvement in the project – personal involvement was related to initial measurement of the near EM fields, definition of the dosimeter requirements, design of the RF part of the dosimeter and measurements to prove the design. The project status is still ongoing.
Project start – August 2011
Project duration – 1 month
Project goal – for any receiver there are defined maximum permitted out of frequency rang levels of input signal which cause decreasing of the receiver sensitivity. Also due to intermodulation products of the odd order (3rd, 5th, 7th...) possibility of the false receiving exist. In order to define input RF filter, mentioned measurement was performed and requested RF filter characteristics ware defined.
Involvement in the project – personal involvement was related to complete process of measurement and filter parameters definition.
In order to promote satellite systems navigation, European Satellite Navigation Competition 2011 was organised. My suggestion how to improve global navigation systems was related to indoor positioning system and this suggestion was honoured with 2ndplace in the national competition level.
Project start – February 2010
Project duration – 3 years
Project goal - The principal goal of project was to improve physical rehabilitation therapies of gait disorders in stroke patients based on BNCI assistive technologies, producing improved systems, providing guidelines for improving future systems, and developing benchmarking and evaluation tools. The project will validate, technically, functionally and clinically, the concept of improving stroke rehabilitation with wearable exoskeletons and robotic gait trainers based on a TOP-DOWN approach.
Involvement in the project – personal involvement was related to evaluate/review the project implementation in form of three review sessions.
Project start – Mart 2011
Project duration – 7 months
Project goal – some of the characteristics like radioactivity are spatial related. In order to determine the isovalue of the radioactivity and distribution over the terrain, the project was requesting the measurement of the radioactivity and to join the measured value to particular position to be determined by GPS equipment. The area of the terrain was about 300x1000 m and about 10000 measurements were done. All the measurement are processed and in form of different maps in 2D and 3D delivered to the customer.
Involvement in the project – personal involvement was to perform all the measurements and process the measured data with visual presentation on the maps.
Project start – 2003
Project duration – 1 month
Project goal – one of the parameters describing the behaviour of some electronic device or equipment is its reflection attenuation, meaning how much of the incident power is reflected at the point of the observation. In this project the goal was to measure the complex characteristics of the antenna in the 27 MHz frequency band and based on that particular data to design the matching network to increase the acceptable frequency rang covering the requested reflection. In this project the initial frequency range of 470 kHz defined with more than 20 dB reflection attenuation was increased to more than 1890 kHz bandwidth with more than 20 dB reflection attenuation meaning that BW*S11 product was increased for more than 4 times.
Involvement in the project – personal involvement was related to whole the project request from initial measurement using the network analyser, designing the matching network and through the measurement to verify the obtained results.
Project start – 1986
Project duration – 2 years
Project goal – stability of the oscillators in the radio communication equipment is of utmost importance. One of the approaches to increase the oscillator stability is by applying the passive resonant structure like high Q cavity resonators or dielectric resonator resulting in the required oscillator stability. In this project the goal was development of the oscilator with required overall stability (short term and long term stability) including the temperature stability.
Involvement in the project – personal involvement was related to study the necessary oscillating condition of the oscilator, influence of the oscillator elements to stability (sensitivity analysis) design of the optimal configuration and to perform all the measurement on the implemented device.
Project start – 1995
Project duration – 1,5 years
Project goal – One of the communication component often used for special purposes and special customers is line transmission equipment. This kind of equipment allows the user to connect different digital terminal equipment. Beside the main information flow there is possibility to transmit auxiliary signals called EOW signals using the EOW interface. Project goal was to develop such line transmission equipment.
Involvement in the project – personal involvement was related to design mentioned EOW interface, support the realisation of the project as a whole and to perform all required measurements and adjustments in order to completely comply with the requirements of the interface.
Project start – 1988
Project duration – 2 years
Project goal – development of the VHF transceiver in the 150-170 MHz frequency range.
Involvement in the project - personal involvement in the project was related to development/design of the main RF oscillator in the equipment. It was based on the VCO/FLL (Voltage Controlled Oscillator / Frequency Locked Loop) stabilisation technique. The RF oscillator signal was driving the frequency readout digital counter. In front of the receiver part was placed Low Noise Amplifier, and RF circuitry dealing with Tx/Rx switching functionality was also designed. In transmitter part design of driver/power amplifier was also done. Overall measurement on the prototype equipment was part of my duties.
Project start – 1984
Project duration – 6 months
Project goal – development of the SSB/voice Tx generator based on the filtering principle. That kind of generator enables packing of the certain number of voice channels (30/120/480) to be transmitted over the same RF frequency.
Involvement in the project – personal involvement was related to design of “reference” generator which enables multiplexing to the requested number of channels. The composite signal was covering frequency rang up to about 2 MHz.
Project start – 1992
Project duration 1,5 year
Project goal – development of the Radio interception/intelligence system enabling receiving of the radio emission in the 4 GHz frequency band.
Involvement in the project – personal involvement was related to design the radio part of the whole system. Main areas I was involved in was antenna measurement, tuning of the Low Noise Amplifier, redesign of RF Filter, mixer/oscillator adjustment, BB filtering/extraction, information extraction
Project start – 2002
Project duration -1 year
Project goal – development of microwave digital and analog transmission equipment working in the 11 GHz frequency band. The equipment is enabling transmission of digital data over the distances of over 50 km in one hop achieving the bit rate of over 100 Mb/s. The analog version is supporting transmission of TV picture and associated voice channels.
Involvement in the project – personal involvement was related to development of the RF circuitry, BB circuitry development and power supply. Coordination of the activity of the team was also done by me.
Project start – 2004
Project duration – 5 months
Project goal – Class of the communication equipment is so called PCM adapter which enable transmission of 4/8 or more phone channels over one pair of cooper wire. In some cases like electrical power plants are, electrical potential between the end points of such communication system could be quite high leading to malfunctioning of the equipment. To prevent such situation adapter from 2 wire/2 way electrical interface to 2 fibre optics has to be developed.
Involvement in the project – personal involvement was related to design of the adapter, realisation of the circuits, measurements and finalising the product in the useful form.
09/1977 - 12/1981, Faculty of Electrical Engineering and Computing, Zagreb University, Radio Communication, Diploma
10/1991 - 11/1994, Post graduate study, Radio Communication, Faculty of Electrical Engineering and Computing, Master of Science in Electrical Engineering
Ericsson TN System
Aviat/Harris Stratex Networks MW Systems
Ericsson GSM/GPRS/UMTS/LTE systems
GPS sattelite positioning system
GIS systems
Electromagnetic field protection standards
Golden Softwaren - Grapher, Didger, Surfer, Voxler
NI Multisim
HF und mikrowellen empfänger und sender systemen
HF/MW Filtern
Niederrausch verstärker
Leistung verstärker
Antenne systemen
Optische systemen / adaptoren
AWR Microvawe Office
FEKO EMSS symulator
Agilent VEE
Pathloss coverage simulation/prediction
Protel EDA
AWR Microvawe Office
FEKO EMSS symulator
Agilent VEE
Matlab
Pathloss coverage prediction
HOBY/INTEREST
• Diving
• Parachuting
• Radio amateur
• Photography, analog and digital
• Roller skating
• Sailing
Electrical Engineering
Elektronik/Elektrotechnik
Automotive
Energiewirtschaft/Energieversorgung
Radio Communication
Telekommunikation
GIS
GPS
e-school introduction in the learning process is introducing in the same time new technology based on the access points (AP's) operating in the 2.4 and 5 GHz frequency range. This technology is in accordance with reccomentations and other regulatory issues, but in sense to provide epidemiological view on this matter, Institute for Medical Research and occupational healt is conducting activity to make contribution in the area of dosimetry if EM fields.
As recognised specialist in area of measurement and RF field simulation, I became a part of the IMROH team working in this project.
EM fields are measured by using of Narda SRM 3006 meter, and simulation by using of REMCOM WirelessInsite software.
Project start – January 2013
Project duration – 2 months
Project goal – existing GPS receivers are well designed to be used in the open areas. To be used in indoor condition by applying special systems for re radiation its compatibility is questionable. The project goal was to investigate the level of compatibility of standard GPS receivers in such situation.
Involvement in the project – personal involvement was related to perform requested compatibility analysis.
Project start – September 2012
Project duration – 3 months
Project goal – In order to be able to perform measurement in known environment regarding the electromagnetic fields (EMC), this project has the goal to design and realise the Transversal Electromagnetic cell (chamber). One of the objects to be tested in this cell is developed EM dosimeter.
Involvement in the project – design of the elements of the cell, verification of the design by using of EM FEKO simulation tool. Upon coordination in phase of realisation, measurement on finished TEM cell was performed to verify the cell behaviour.
Project start – June 2012
Project duration – 3 months
Project goal – GSM system as mobile communication system is additionally standardised by GSM-R (GSM Railway) standard. In order to enable requested communication parameters prediction of the quality of radio signal strength coverage was requested. After prediction of the coverage was done, verification of the prediction is necessary.
Involvement in the project – personal involvement was related to ensure sufficient good terrain elevation model input data, decide about optimal transmitter positions and perform the coverage prediction. Verification of the prediction was not done doe to changes in the overall plan.
Project start – August 2011
Project duration – 3 months
Project goal – System design of the RFID/GPS based solution intended for tracking and management of the radioactive material. Considering importance of the radioactive material issues, solution with special requirement in reliability and precision of location had to be defined. The location based solution covered both in and outdoor areas.
Involvement in the project – personal involvement was related to complete system design of the solution.
Project start – February 2012
Project duration – open
Project goal – according to the international regulatory agencies in the area of electromagnetic exposures the only persons who are in position to be exposed to the limit values of the electromagnetic fields are professional working in the area of near EM fields. Our knowledge of the mechanisms of the influence of EM fields to human body is not investigated enough and that lead us to necessity of recording much detailed data of that exposure. For that purpose we need adequate EM dosimeter.
Involvement in the project – personal involvement was related to initial measurement of the near EM fields, definition of the dosimeter requirements, design of the RF part of the dosimeter and measurements to prove the design. The project status is still ongoing.
Project start – August 2011
Project duration – 1 month
Project goal – for any receiver there are defined maximum permitted out of frequency rang levels of input signal which cause decreasing of the receiver sensitivity. Also due to intermodulation products of the odd order (3rd, 5th, 7th...) possibility of the false receiving exist. In order to define input RF filter, mentioned measurement was performed and requested RF filter characteristics ware defined.
Involvement in the project – personal involvement was related to complete process of measurement and filter parameters definition.
In order to promote satellite systems navigation, European Satellite Navigation Competition 2011 was organised. My suggestion how to improve global navigation systems was related to indoor positioning system and this suggestion was honoured with 2ndplace in the national competition level.
Project start – February 2010
Project duration – 3 years
Project goal - The principal goal of project was to improve physical rehabilitation therapies of gait disorders in stroke patients based on BNCI assistive technologies, producing improved systems, providing guidelines for improving future systems, and developing benchmarking and evaluation tools. The project will validate, technically, functionally and clinically, the concept of improving stroke rehabilitation with wearable exoskeletons and robotic gait trainers based on a TOP-DOWN approach.
Involvement in the project – personal involvement was related to evaluate/review the project implementation in form of three review sessions.
Project start – Mart 2011
Project duration – 7 months
Project goal – some of the characteristics like radioactivity are spatial related. In order to determine the isovalue of the radioactivity and distribution over the terrain, the project was requesting the measurement of the radioactivity and to join the measured value to particular position to be determined by GPS equipment. The area of the terrain was about 300x1000 m and about 10000 measurements were done. All the measurement are processed and in form of different maps in 2D and 3D delivered to the customer.
Involvement in the project – personal involvement was to perform all the measurements and process the measured data with visual presentation on the maps.
Project start – 2003
Project duration – 1 month
Project goal – one of the parameters describing the behaviour of some electronic device or equipment is its reflection attenuation, meaning how much of the incident power is reflected at the point of the observation. In this project the goal was to measure the complex characteristics of the antenna in the 27 MHz frequency band and based on that particular data to design the matching network to increase the acceptable frequency rang covering the requested reflection. In this project the initial frequency range of 470 kHz defined with more than 20 dB reflection attenuation was increased to more than 1890 kHz bandwidth with more than 20 dB reflection attenuation meaning that BW*S11 product was increased for more than 4 times.
Involvement in the project – personal involvement was related to whole the project request from initial measurement using the network analyser, designing the matching network and through the measurement to verify the obtained results.
Project start – 1986
Project duration – 2 years
Project goal – stability of the oscillators in the radio communication equipment is of utmost importance. One of the approaches to increase the oscillator stability is by applying the passive resonant structure like high Q cavity resonators or dielectric resonator resulting in the required oscillator stability. In this project the goal was development of the oscilator with required overall stability (short term and long term stability) including the temperature stability.
Involvement in the project – personal involvement was related to study the necessary oscillating condition of the oscilator, influence of the oscillator elements to stability (sensitivity analysis) design of the optimal configuration and to perform all the measurement on the implemented device.
Project start – 1995
Project duration – 1,5 years
Project goal – One of the communication component often used for special purposes and special customers is line transmission equipment. This kind of equipment allows the user to connect different digital terminal equipment. Beside the main information flow there is possibility to transmit auxiliary signals called EOW signals using the EOW interface. Project goal was to develop such line transmission equipment.
Involvement in the project – personal involvement was related to design mentioned EOW interface, support the realisation of the project as a whole and to perform all required measurements and adjustments in order to completely comply with the requirements of the interface.
Project start – 1988
Project duration – 2 years
Project goal – development of the VHF transceiver in the 150-170 MHz frequency range.
Involvement in the project - personal involvement in the project was related to development/design of the main RF oscillator in the equipment. It was based on the VCO/FLL (Voltage Controlled Oscillator / Frequency Locked Loop) stabilisation technique. The RF oscillator signal was driving the frequency readout digital counter. In front of the receiver part was placed Low Noise Amplifier, and RF circuitry dealing with Tx/Rx switching functionality was also designed. In transmitter part design of driver/power amplifier was also done. Overall measurement on the prototype equipment was part of my duties.
Project start – 1984
Project duration – 6 months
Project goal – development of the SSB/voice Tx generator based on the filtering principle. That kind of generator enables packing of the certain number of voice channels (30/120/480) to be transmitted over the same RF frequency.
Involvement in the project – personal involvement was related to design of “reference” generator which enables multiplexing to the requested number of channels. The composite signal was covering frequency rang up to about 2 MHz.
Project start – 1992
Project duration 1,5 year
Project goal – development of the Radio interception/intelligence system enabling receiving of the radio emission in the 4 GHz frequency band.
Involvement in the project – personal involvement was related to design the radio part of the whole system. Main areas I was involved in was antenna measurement, tuning of the Low Noise Amplifier, redesign of RF Filter, mixer/oscillator adjustment, BB filtering/extraction, information extraction
Project start – 2002
Project duration -1 year
Project goal – development of microwave digital and analog transmission equipment working in the 11 GHz frequency band. The equipment is enabling transmission of digital data over the distances of over 50 km in one hop achieving the bit rate of over 100 Mb/s. The analog version is supporting transmission of TV picture and associated voice channels.
Involvement in the project – personal involvement was related to development of the RF circuitry, BB circuitry development and power supply. Coordination of the activity of the team was also done by me.
Project start – 2004
Project duration – 5 months
Project goal – Class of the communication equipment is so called PCM adapter which enable transmission of 4/8 or more phone channels over one pair of cooper wire. In some cases like electrical power plants are, electrical potential between the end points of such communication system could be quite high leading to malfunctioning of the equipment. To prevent such situation adapter from 2 wire/2 way electrical interface to 2 fibre optics has to be developed.
Involvement in the project – personal involvement was related to design of the adapter, realisation of the circuits, measurements and finalising the product in the useful form.
09/1977 - 12/1981, Faculty of Electrical Engineering and Computing, Zagreb University, Radio Communication, Diploma
10/1991 - 11/1994, Post graduate study, Radio Communication, Faculty of Electrical Engineering and Computing, Master of Science in Electrical Engineering
Ericsson TN System
Aviat/Harris Stratex Networks MW Systems
Ericsson GSM/GPRS/UMTS/LTE systems
GPS sattelite positioning system
GIS systems
Electromagnetic field protection standards
Golden Softwaren - Grapher, Didger, Surfer, Voxler
NI Multisim
HF und mikrowellen empfänger und sender systemen
HF/MW Filtern
Niederrausch verstärker
Leistung verstärker
Antenne systemen
Optische systemen / adaptoren
AWR Microvawe Office
FEKO EMSS symulator
Agilent VEE
Pathloss coverage simulation/prediction
Protel EDA
AWR Microvawe Office
FEKO EMSS symulator
Agilent VEE
Matlab
Pathloss coverage prediction
HOBY/INTEREST
• Diving
• Parachuting
• Radio amateur
• Photography, analog and digital
• Roller skating
• Sailing
Electrical Engineering
Elektronik/Elektrotechnik
Automotive
Energiewirtschaft/Energieversorgung
Radio Communication
Telekommunikation
GIS
GPS
Direktester geht's nicht! Ganz einfach Freelancer finden und direkt Kontakt aufnehmen.