Informatics Publishing Limited

Amit V. Patel ¹, Yogeshwar P. Kosta ², Neetirajsinh Chhasatia ³

Affiliations
1 C S Patel Institute of Technology, Changa, IN
2 Charotar University of Science and Technology, Changa, IN
3 Electronics & Communication Engineering Department, Charotar University of Science and Technology-CHARUSAT, Changa, IN

Abstract

Waveguides are robust structure and handle high power well, compared to transmission line filter such as coplanar lines, microstrips and striplines. Modeling techniques of the waveguide of the filter using the non-planner model that is most preferable among all present for low cost mass production of microwave and millimeter wave circuits and systems. The mathematical computations for the design dimensions of a wave guide band pass filter are implemented using HFSS software based on the insertion loss method. This paper basically concerned with the improvement characteristics of post coupled designs that have been modeled. This paper demonstrates the approach to overcome the limitation inherent in post coupled , hairpin as well as suppression of the harmonic which is prominent in the micro strip coupled filter and resonator topology. This has been achieved using the design concept of finite conductive post coupled obstacles into the perfect impedance match rectangular waveguide. The modified topologies of the post coupled along with the concept of reduced insertion loss and better return loss with improved quality factor has been achieved. Furthermore, presented structures results are sensitive to standard design equations and dimensions of the elements used. The resonator topologies were designed here at the center frequency of 11.2 GHz, with insertion loss -0.04dB and return loss -67.8616dB with narrow bandwidth and VSWR (Voltage standing wave ratio) =1. 05.

Keywords

T-Post, Insertion Loss, Return Loss, Improved Characteristics.

Full Text

     

Falguni Raval ¹, Y. P. Kosta ², Amit V. Patel ¹, Dhara Patel ¹

Affiliations
1 Department of Electronics and Communication Engineering, Charotar University of Science and Technology, Changa, Pin: 388 421, Gujarat, IN
2 Mawadi Education Foundation’s Group of Institutions, Rajkot Morbi Road, At & PO Gauridad 360003, IN

Abstract

This paper proposes Microstrip Rectangular Patch Antenna in which metamaterial properties applied at ground Plane. The paper also analyzed the performance of Microstrip Patch Antenna with and1 without using the metamaterial structure at 10 GHz. The works mainly include Metamaterial as Defected ground plane. The Open Slot Split Ring resonator is used as metamaterial. The effective permeability parameters are retrieved from s parameters for unit cell Split Ring Resonator, revealing the presence of magnetic resonances around resonance frequency 10 GHz. All antenna parameters such as Return Loss, Gain, and Band width were checked. The main focus of this paper was to check the effect of metamaterial so that Patch antenna used for multi band operation.

Keywords

Defected Ground Plane (DGP), Open Slot Split Ring Resonator (OSSRR), Rectangular Patch Antenna, Microstrip, Metamaterial, Split Ring Resonator (SRR).

Full Text