Compact ultra-wideband monopole antenna with tunable notch bandwidth/frequency ratio

Author:

Srivastava Karunesh1,Varshney Gaurav2,Singh Rajeev3

Affiliation:

1. Department of Electronics and Communication , Ajay Kumar Garg Engineering College , Ghaziabad 201009 , India

2. National Institute of Technology Patna , Patna 800005, India

3. Department of Electronics and Communication , University of Allahabad , Prayagraj 211002 , India

Abstract

Abstract A compact tunable notch band ultra-wideband (UWB) antenna is implemented. The band notch characteristics have been obtained by placing a square-shaped metallic loop in the upper ground plane connected via PIN diode. The obtained notched frequency bandwidth can be altered by changing the states of the PIN diode. UWB response with narrow-band notch operation is observed when PIN diode is in ON state. When the PIN diode is in OFF state, the bandwidth of the obtained band notch widens by suppressing the first higher-order resonance and thus a narrow dual-band response is obtained. Moreover, the ratio of the frequency of first higher-order to the fundamental mode in the pass-band can be tuned with the different values as 1.584 and 2.20 in the ON and OFF state of the PIN diode, respectively. Furthermore, the antenna structure offers a compact geometry for the operation with the UWB response with band notch characteristics.

Publisher

Walter de Gruyter GmbH

Subject

Electrical and Electronic Engineering

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