H‐plane 3‐dB hybrid ring of high isolation in substrate‐integrated rectangular waveguide (SIRW)

An H‐plane hybrid ring 3‐dB power divider constructed with substrate integrated rectangular waveguide (SIRW) is proposed. Theoretical simulations are carried out at the X‐ and Ka‐bands. The results show that the isolation between two output ports is high up to 35 dB and good 3‐dB power division within the band of interest is observed also, that is, less than 0.3‐dB derivation in the band of interest. In addition, the simulation results at the X‐band shows a bandwidth of 10% at −15 dB. A prototype in the Ka‐band is fabricated and the measured data at the Ka‐band shows a bandwidth of 7% at −15 dB, in good agreement with simulation. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 502–505, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21392

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