A Wideband Differentially-fed Higher-Order Mode Laminated Resonator Antenna With High Gain

This paper proposes a wideband differentially-fed rectangular laminated resonator antenna (LRA) with high gain. To relax the tolerance and cost issues of fabrication, the size of LRA is enlarged by designing it with higher-order mode operation. TM
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mode of the rectangular LRA is excited by the inserted differential pair of L-shaped probes. Meanwhile, a relatively high gain is achieved benefiting from the enlarged radiation aperture surface of LRA. As a proof of concept, an antenna prototype in PCB technology is designed, fabricated and measured. Simulated and experimental results demonstrate that the proposed higher-order LRA owns a wide bandwidth, high gain, symmetrical patterns, low cross polarization and high radiation efficiency. The proposed higher-order mode concept is promising for the design of LRAs in the millimeter wave (MMW) and terahertz (THz) bands.