2008 Asia-Pacific Symposium on Electromagnetic Compatibility and 19th International Zurich Symposium on Electromagnetic Compatibility, 2008
In this paper, the shielding effectiveness of a composite component bay is simulated using both f... more In this paper, the shielding effectiveness of a composite component bay is simulated using both frequency domain and time domain methods. Five monitoring points are equally separated inside the component bay. Results gathered from measurements are compared to simulation results. The incident field is excited from different azimuth and elevation angles around the component bay in both simulations and measurements.
2006 17th International Zurich Symposium on Electromagnetic Compatibility, 2006
A plot of land was allocated for the building of recreational facilities. However, the site is lo... more A plot of land was allocated for the building of recreational facilities. However, the site is located next to a HF transmission station, thus raising concerns of radiation hazards to personnel at the site. Initial electric field measurements concluded that some parts of the land experienced electric field levels that exceeded the maximum safety exposure level (28V/m) recommended by the
2006 17th International Zurich Symposium on Electromagnetic Compatibility, 2006
Recent advancements in the field of communications technology include the use of high speed data ... more Recent advancements in the field of communications technology include the use of high speed data transmissions with extremely wide frequency bandwidth. This technology is widely employed in ultra-wideband (UWB) communication systems which can produce significant EM emissions at microwave frequencies. A key element in assessing the vulnerability of equipment to UWB signals involves an understanding on the phenomenon of transient
2012 Asia-Pacific Symposium on Electromagnetic Compatibility, 2012
In this paper, the out-of-band characteristics of the airborne blade antennas are studied in term... more In this paper, the out-of-band characteristics of the airborne blade antennas are studied in terms of their gain and radiation properties. A prediction model was derived for both the lower out-of-band and upper out-of-band frequencies of a typical blade antenna.
2002 3rd International Symposium on Electromagnetic Compatibility, 2002
Abstract: As a time-efficient and cost-effective EMC test facility candidate, the reverberation c... more Abstract: As a time-efficient and cost-effective EMC test facility candidate, the reverberation chamber has attracted much attention from academia and industries. The objective of the paper is to introduce its general background, standardisation status and practical applications, highlighting ...
International Zurich Symposium on Electromagnetic Compatibility, 2012
With proper frequency management, one can prevent in-band radio frequency interference (RFI). How... more With proper frequency management, one can prevent in-band radio frequency interference (RFI). However, at out-of-band (OOB) frequencies, RFI is almost impossible to prevent. And such OOB interference characteristics of communication devices may not be provided by the supplier of the devices. In this paper, we present the results of OOB conducted susceptibility measurement for a VHF/FM communication system. Detailed analysis
A novel square microstrip patch antenna with a single-patch and single-layer structure is demonst... more A novel square microstrip patch antenna with a single-patch and single-layer structure is demonstrated. By incorporating an air-filled substrate with a thickness of around 0.08 λ1 and having one patch edge shorted with three shorting-pins, an impedance bandwidth (return loss <-10dB) of 67.5% from 3.62 GHz to 7.32 GHz is obtained for this probe-fed compact and broadband antenna. The details
IEEE Transactions on Microwave Theory and Techniques, 2001
... Ya Jun Wang, Ching Kwang Lee, Wee Jin Koh, Member, IEEE, and Yeow Beng Gan, Member, IEEE ... ... more ... Ya Jun Wang, Ching Kwang Lee, Wee Jin Koh, Member, IEEE, and Yeow Beng Gan, Member, IEEE ... The typical impedance behavior and far-field radiation pattern characteristics of eight different an-tenna configurations are discussed theoretically and experimen-tally. ...
2008 Asia-Pacific Symposium on Electromagnetic Compatibility and 19th International Zurich Symposium on Electromagnetic Compatibility, 2008
In this paper, the shielding effectiveness of a composite component bay is simulated using both f... more In this paper, the shielding effectiveness of a composite component bay is simulated using both frequency domain and time domain methods. Five monitoring points are equally separated inside the component bay. Results gathered from measurements are compared to simulation results. The incident field is excited from different azimuth and elevation angles around the component bay in both simulations and measurements.
2006 17th International Zurich Symposium on Electromagnetic Compatibility, 2006
A plot of land was allocated for the building of recreational facilities. However, the site is lo... more A plot of land was allocated for the building of recreational facilities. However, the site is located next to a HF transmission station, thus raising concerns of radiation hazards to personnel at the site. Initial electric field measurements concluded that some parts of the land experienced electric field levels that exceeded the maximum safety exposure level (28V/m) recommended by the
2006 17th International Zurich Symposium on Electromagnetic Compatibility, 2006
Recent advancements in the field of communications technology include the use of high speed data ... more Recent advancements in the field of communications technology include the use of high speed data transmissions with extremely wide frequency bandwidth. This technology is widely employed in ultra-wideband (UWB) communication systems which can produce significant EM emissions at microwave frequencies. A key element in assessing the vulnerability of equipment to UWB signals involves an understanding on the phenomenon of transient
2012 Asia-Pacific Symposium on Electromagnetic Compatibility, 2012
In this paper, the out-of-band characteristics of the airborne blade antennas are studied in term... more In this paper, the out-of-band characteristics of the airborne blade antennas are studied in terms of their gain and radiation properties. A prediction model was derived for both the lower out-of-band and upper out-of-band frequencies of a typical blade antenna.
2002 3rd International Symposium on Electromagnetic Compatibility, 2002
Abstract: As a time-efficient and cost-effective EMC test facility candidate, the reverberation c... more Abstract: As a time-efficient and cost-effective EMC test facility candidate, the reverberation chamber has attracted much attention from academia and industries. The objective of the paper is to introduce its general background, standardisation status and practical applications, highlighting ...
International Zurich Symposium on Electromagnetic Compatibility, 2012
With proper frequency management, one can prevent in-band radio frequency interference (RFI). How... more With proper frequency management, one can prevent in-band radio frequency interference (RFI). However, at out-of-band (OOB) frequencies, RFI is almost impossible to prevent. And such OOB interference characteristics of communication devices may not be provided by the supplier of the devices. In this paper, we present the results of OOB conducted susceptibility measurement for a VHF/FM communication system. Detailed analysis
A novel square microstrip patch antenna with a single-patch and single-layer structure is demonst... more A novel square microstrip patch antenna with a single-patch and single-layer structure is demonstrated. By incorporating an air-filled substrate with a thickness of around 0.08 λ1 and having one patch edge shorted with three shorting-pins, an impedance bandwidth (return loss <-10dB) of 67.5% from 3.62 GHz to 7.32 GHz is obtained for this probe-fed compact and broadband antenna. The details
IEEE Transactions on Microwave Theory and Techniques, 2001
... Ya Jun Wang, Ching Kwang Lee, Wee Jin Koh, Member, IEEE, and Yeow Beng Gan, Member, IEEE ... ... more ... Ya Jun Wang, Ching Kwang Lee, Wee Jin Koh, Member, IEEE, and Yeow Beng Gan, Member, IEEE ... The typical impedance behavior and far-field radiation pattern characteristics of eight different an-tenna configurations are discussed theoretically and experimen-tally. ...
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