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Conical beam concentric array radial slot line antennas (RSLA) have been fabricated for the 60 GHz band. A PTFE substrate with copper foils is used. The coaxial feeder has been modified to improve the reflection. The measured reflection has revealed that the -15 dB bandwidth is about 500 MHz around the design frequency. The bandwidth of the gain has also improved because of the feeder modification.
Antennas and Propagation Society International Symposium, 1999. IEEE (Volume:3 )
Date of Conference: 11-16 July 1999