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A Simple Polarization-Reconfigurable Series-Fed Patch Array Using Switchable Feeding Network
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DOI：10.1109/LAWP.2024.3403880.png)
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Abstract
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In this letter, we presents a polarization-reconfigurable series-fed patch antenna with high gain and a simple switching mechanism. The proposed design comprises of four slotted circular patches arranged in a 1 x 4 configuration. For excitation, the array is capacitive fed by a single T-junction power divider. By controlling the bias state of three p-i-n diodes on the divider, the antenna's polarization can be switched among a single linear and dual-sense circular polarization. To validate the design concept, an array prototype is fabricated and measured at the operating frequency of 5.0 GHz. The measurements result in a common operating bandwidth for all radiating modes of about 1.8%, ranging from 4.95 GHz to 5.04 GHz. Besides, a stable broadside gain of around 12 dBi is also obtained.
Keywords:
Antenna arrays
Antennas
Switches
PIN photodiodes
Antenna measurements
Vectors
Prototypes
Antenna array
feeding network
high gain
patch
polarization-reconfigurable
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