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2024-11-06
A 2-Port High Isolation Millimeter Wave Dual-Band Antenna Based on SIW Back-Cavity Slot
By
Progress In Electromagnetics Research M, Vol. 130, 29-36, 2024
Abstract
To enhance the transmission rate and bandwidth utilization of Multiple-Input Multiple-Output (MIMO) communication systems, a dual-band MIMO antenna for millimeter waves is proposed, which is based on a substrate-integrated waveguide (SIW) and fed by a 50 Ω microstrip line. To achieve the dual-band performance, it employs a modified dual P-shaped slot instead of the conventional single P-shaped slot. The modified slot antenna generates dual-frequency radiation by exciting the primary and mixed modes in the circular resonant cavity. To improve the channel capacity of the system, the antenna is formed into a 2-element antenna, and the isolation of the antenna is improved by pattern diversity and defected ground structure (DGS). The antenna's dimension is 20 x 18.9 x 0.508 mm3. Measured results show that the impedance bandwidth of the antenna is about 26.7 GHz-27.9 GHz and 37.95 GHz-40.92 GHz with peak gain of 5.63 dBi and 6.35 dBi, respectively. In addition, the isolation degree is greater than 30 dB, the envelope correlation coefficient (ECC) less than 0.0002, and the diversity gain (DG) greater than 9.995. The antenna shows the advantages of low profile, dual-frequency radiation, and high isolation characteristics, which are well suited for millimeter-wave wireless communication systems.
Citation
Mingming Gao, Chang Ge, Jingchang Nan, Chunli Liu, Hongliang Niu, and Hang Yuan, "A 2-Port High Isolation Millimeter Wave Dual-Band Antenna Based on SIW Back-Cavity Slot," Progress In Electromagnetics Research M, Vol. 130, 29-36, 2024.
doi:10.2528/PIERM24091303
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