volume | PIER Journals

2014-06-21

Design of a Miniaturized Zeroth- and First-Order Resonant Antenna with Mushroom Cells and Interdigital Capacitors

Ke Li,

Dr. Ke Li

National Laboratory of Science and Technology on Antennas and Microwaves

Xidian University

China

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Yuan-Ming Cai,

Dr. Yuan-Ming Cai

National Key Laboratory of Science and Technology on Antennas and Microwaves

Xidian University

China

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Long Li,

Prof. Long Li

Xidian Unviersity

China

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Chang-Hong Liang

Professor Chang-Hong Liang

School of Electronics Engineering

Xidian University

China

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Progress In Electromagnetics Research Letters, Vol. 47, 1-5, 2014

doi:10.2528/PIERL14050802

Abstract

A novel design of miniaturized dual-bandantenna based on mushroom cell and interdigital capacitor is presented in this paper. Four transmission line (TL) elements are loaded in a microstrip antenna, and each one is composed ofamushroom cell and interdigital capacitors. The interdigital capacitors contribute to the series capacitance and metallicvia-hole of mushroom structuresresult in the shunt inductance in the equivalent circuit model. The antenna works as a zeroth-order (f₀= 2.51 GHz) and first-order (f₁ = 3.78 GHz) resonant antenna with varied radiation patterns. Omnidirectionalradiation pattern and unidirectional radiation pattern are obtained at 2.51 GHz and 3.78 GHz, respectively.The overall size of the antenna is only 0.25×0.25×0.017λ₀³ (at f₀= 2.51 GHz). The proposed antenna features compact structure, low profile and easy fabrication. Good agreement between the simulated and measured results is also achieved, validating our design concept.

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Ke Li, Yuan-Ming Cai, Long Li, and Chang-Hong Liang, "Design of a Miniaturized Zeroth- and First-Order Resonant Antenna with Mushroom Cells and Interdigital Capacitors," Progress In Electromagnetics Research Letters, Vol. 47, 1-5, 2014.
doi:10.2528/PIERL14050802

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