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Article proposes reconfigurable E‐shaped patch antenna using PIN diode to switch the antenna between two frequency states: 335–565 MHz, 1.29–1.42 GHz and 2.03–2.28 GHz in multiband and 300–645 MHz in single band. Placement of the rectangular slots operates the patch in multiband. Single band is achieved using a bandpass filter. Parasitic element improves the impedance characteristics.
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Kumar et al. (2016) studied this question.
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