Bandstop To Allpass Reconfigurable Filter Technique In SPDT Switch Design

Shairi, Noor Azwan and Ahmad, Badrul Hisham and Peng Wen, Wong (2013) Bandstop To Allpass Reconfigurable Filter Technique In SPDT Switch Design. Progress In Electromagnetics Research C, 39. pp. 265-277. ISSN 1937-8718

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In this paper, a bandstop to allpass reconfigurable filter technique is proposed in Single Pole Double Throw (SPDT) switch design. Proof of concept of the bandstop to allpass reconfigurable filter is presented. It is physically realized using transmission line and radial stub in 3.5 GHz band (3.4 to 3.6 GHz). The isolation, insertion loss and return loss of the SPDT switches are analyzed and to validate this technique the prototypes are fabricated using FR4 substrate with a thickness of 1.6 mm. A very good agreement is shown between the simulated and measured results. Using this technique, it is able to produce more than 30 dB isolation with minimum number of PIN diodes, thus reducing 42.7% of the total circuit size compared with conventional design. Besides, additional 22.9% of isolation bandwidth can be obtained with the use of radial stub compared with transmission line stub. The potential application of this SPDT switch is Time Division Duplex (TDD) switching for WiMAX and LTE communication system in the 3.5 GHz band.

Item Type: Article
Uncontrolled Keywords: Bandstop, Filter, Switch Design
Divisions: Faculty of Electronics and Computer Engineering > Department of Telecommunication Engineering
Depositing User: Mr Noor Azwan Shairi
Date Deposited: 13 Jan 2014 04:05
Last Modified: 07 Jun 2021 12:54
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