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Novel symmetric and asymmetric diplexers are realised using dual-mode substrate integrated hexagonal cavity (SIHC) with the help of perturbation. Four different diplexers are designed and fabricated. The first three designs consist of single dual-mode SIHC in both Rx (lower frequency band) and Tx (higher frequency band) channels using same coupling topology and the last design consists of two dual-mode...
In this paper, an eighth-mode substrate integrated circular cavity (EMSICC) based beam scanning array antenna having reconfigurable frequency band using PIN diodes is realized at X-band. A single annular complementary split ring resonator (CSRR) is introduced in ground plane of EMSICC and by rotating the ring, a shift of resonant frequency is obtained. Further, to implement the rotation, PIN diodes...
In this paper, a novel balanced amplifier antenna has been proposed for X-band. The antenna module consists of a microstrip fed ground slot excited cylindrical dielectric resonator (CDR). The unbalanced antenna output is converted into balanced outputs by a 180 degree rat-race hybrid which feed a differential low noise amplifier (LNA) consisting of two cascade stages. A marchand balun type biasing...
In this paper a novel design technique for a planar highly miniaturized Substrate Integrate Waveguide (SIW) based triplexer has been proposed at C band. The proposed design employs evanescent mode propagation by placing a defected two pole resonating structure on the top layer of a waveguide section, which provides a pass-band at much lower frequency than the cut-off frequency of the unloaded waveguide...
In this paper, novel planar miniaturized bandpass filters using half-mode Substrate Integrated Waveguide (HMSIW) technology based rhombic resonators are presented. The proposed designs use two half mode rhombic resonator connected by the coupling window in the common sidewall to implement miniaturized planar filters. Design-I is a two pole bandpass filter implemented using fundamental mode of the...
This paper presents a dual-mode bandpass filter with asymmetric passband response. Hexagonal shaped Substrate Integrated Cavity (SIHC) has been used to implement the proposed filter. Perturbation technique has been used to realize this bandpass response. The filter has four poles and one transmission zero introduced at the left of the passband. The design has passband insertion loss of 0.65 dB and...
In this paper, a novel design of broadband coaxial to substrate integrated waveguide (SIW) transition has been implemented. The difficulties to get impedance matching between SIW and excitation port especially for thin substrate has been investigated and design steps to overcome the problem has been discussed. A two port SIW section using back-to-back configuration of the proposed transition is designed...
A Dual-mode substrate integrated waveguide hexagonal cavity (SIHC) filter using hexagonal shaped cavity for X-Band application has been proposed in this paper. Use of perturbation technique to achieve dual mode response has been investigated. The field patterns of the degenerate modes and the mode splitting characteristics are also studied. The theoretical analysis with the help of coupling matrix...
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