Affiliations: Charotar University of Science and Technology, Changa, Ta-Petlad, D-Anand, Gujarat, India
Correspondence:
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Corresponding author: Amit Patel, Charotar University of Science and Technology, Changa, Ta-Petlad, D-Anand, Gujarat, India. E-mail:Amitvpatel.ec@ecchanga.ac.in
Abstract: This paper demonstrates transverse nonplanar resonators consisting of
symmetrically placed obstacles (posts which made up of same or different
type of materials) coupled into rectangular waveguide. Introducing
posts inside a waveguide in proposed structure creates discontinuity and
become a cavity resonator. Resonance is created at X band, Ku band and Ka
band frequencies are reported. Simulation results demonstrates that
resonators's results are matched to free-space as well as having a superior
insertion loss and better return loss of conductive posts compare to
dielectric posts. Moreover, obstructing the E-field (using conductive posts)
compare to the H-field (using dielectric posts) are given better insertion
loss and impedance matching characteristics. However, insertion of
amalgamated obstacles into rectangular waveguide generates good transmission
and reflection zeros compared to other two topologies at resonant
frequencies which are described here. Posts coupled waveguide resonators
having high power handling capacity so it can be utilized for Base
transceiver station, Satellite Communication, Space applications, sensors as
well as the fusion plasma diagnostics system. All the proposed structures
are simulated with Ansoft's finite-element High Frequency Structure
Simulator (HFSS) tool to demonstrate the characteristics of the resonators
using a rectangular waveguide with center frequency of 11.2 GHz for X-band.
In addition, the equivalent model of resonator is simulated in ADS (Advance
designing system). It is observed that offered topologies are very sensitive
to the parameters deviation (Post coupled waveguide resonator performance
depends on diameter of conductive post, elevation of post and detachment
between posts).
