Compact and Wideband Terahertz Lens Integrated Bow-tie Antenna for detector

In this paper, a compact and wideband lens integrated bow-tie antenna with center-fed is presented for detector applications. It contains a pair of slot stubs for broadening the bandwidth and a pair of complementary metals for the compact design. Additionally, the introduction of two pads where the Schottky diode is integrated across the feeding terminals of the bow-tie antenna improves the impedance bandwidth with creating a new resonance which simultaneously leads the low-frequency signal with a small footprint. To suppress surface wave propagation, a quartz lens is presented, which can simultaneously enhance the gain. The size of the bow-tie is
$0.7 \text{mm}\times 0.51\ \text{mm}$
. The simulated results show that the bandwidth of the proposed bow-tie antenna is 205–374 GHz, which covers the atmosphere windows of 220 GHz and 340 GHz.