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This paper presents a modified way of epoxy application in the TM mode dielectric resonator based filter fabrication. It has been found that quarter cut dielectric resonators in transversal configuration inside a hollow waveguide cavity are quite sensitive to the application of epoxy used for its placement. An exhaustive study has been performed for the judicious application of the epoxy between various...
A 6-pole pre select filter based on quarter cut dielectric resonators has been designed and developed at C-band. This PSF is intended for the use in a satellite application where it will provide better than 120dBc rejection to the satellite transmit band. The PSF has a bandwidth of 60 MHz and synthesis of filtering function is done using chebyshev polynomials. The loading of hollow waveguide cavity...
This paper proposes a novel method for realization of tuning less Ka-band Hybrid with enhanced RF performance compared to conventional approach of realizing microstrip circuits (Hybrid). This is a first time that we have developed a tuning less 3-dB quadrature hybrid. This hybrid is a single section branch line coupler designed and developed at 29.5 to 30.0GHz. The amplitude imbalance over the band...
This paper discusses the design, in-house development and the challenges involved in the realization of Ka-band Hybrid for future Ka-band payloads. This is a single section 3-dB quadrature hybrid designed at 29.5 GHz to 30.0 GHz. This hybrid is developed for the first time at this band and is different from our convectional hybrid at C and Ku-band. The paper will address various critical aspects related...
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