ENG Resonators-Based Reconfigurable Microwave Filter for Stopband Frequency Diversity

In this paper, a reconfigurable microwave stopband filter is presented based on two different designs of ENG unit-cell. The resonant unit-cell structures are designed using a complementary patch in the shape of square and circle, each of which is surrounded by a thin complementary ring-type geometry...

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Bibliographic Details
Main Authors: Kumari, Ratnesh, Yadav, Rahul, Patel, Piyush N.
Format: Conference Proceeding
Language:English
Subjects:
epsilon negative
frequency diversity
Microstrip
Microwave circuits
Microwave filters
Resonator filters
Resonators
transmission coefficient
Transversal filters
unit-cell
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Summary:In this paper, a reconfigurable microwave stopband filter is presented based on two different designs of ENG unit-cell. The resonant unit-cell structures are designed using a complementary patch in the shape of square and circle, each of which is surrounded by a thin complementary ring-type geometry. The overall size of the individual ENG unit-cell is 9\times 7.12\ \mathbf{mm}^{2} which exhibit negative permittivity at 2.68 GHz and 2.42 GHz respectively. The stopband filter is implemented on Rogers TMM-13i substrate of relative permittivity \boldsymbol{\varepsilon_{r}}=12.85 and height \boldsymbol{h}=1.27 mm. The filter consists of unit-cells placed in the close vicinity of a 50\ \boldsymbol{\Omega} microstrip line. In the proposed filter design, the count of ENG unit-cell resonators can be increased and selectively excited from 50\ \boldsymbol{\Omega} microstrip line through PIN diodes to achieve diversity in the frequency of stopband transmission.
ISSN:2325-9418
DOI:10.1109/INDICON.2017.8487582