Title :
T-junction array to feed partially dielectric-filled oversized rectangular waveguide
Author :
Miroslav Samardzija;Jiro Hirokawa;Makoto Ando
Author_Institution :
Dept. of Electrical & Electronic Eng., Tokyo Institute of Technology, 2-12-1, O-okayama, Meguro-ku, 152-8552, Japan
Abstract :
A waveguide feed is designed to feed partially dielectric-filled oversized rectangular waveguide. Waveguide feed is arranged as twelve in-series cascade of power dividers and two matching junctions. The matching junction´s phase transmission control ranges form −110 deg. to −230 deg. The overall reflection at the design frequency is below −10 dB. A frequency shift of 430 MHz is observed where the reflection is below −21 dB. The dielectric constant used is relatively low resulting in amplitude and phase ripple of −11 dB and 30 deg. respectively. In order to confirm the operability of waveguide feed, radiating slots will be designed on the upper plate of oversized waveguide. The measured results will be presented and evaluated.
Keywords :
"Feeds","Rectangular waveguides","Waveguide components","Power dividers","Waveguide junctions","Dielectric constant","Dielectric losses","Reflection","Frequency","Dielectric substrates"
Conference_Titel :
Antennas and Propagation Society International Symposium, 2009. APSURSI ´09. IEEE
Print_ISBN :
978-1-4244-3647-7
Electronic_ISBN :
1947-1491
DOI :
10.1109/APS.2009.5171781
