Planar dual-polarized millimeter-wave shared-aperture array antenna with high band isolation

Yuyan CAO; Zijun GUO; Zhangcheng HAO

doi:10.1631/FITEE.2200122

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Planar dual-polarized millimeter-wave shared-aperture array antenna with high band isolation

Regular Papers | Updated：2022-10-28

- Planar dual-polarized millimeter-wave shared-aperture array antenna with high band isolation
- 具有高隔离度的毫米波平面双极化共口径阵列天线
- Frontiers of Information Technology & Electronic Engineering Vol. 23, Issue 10, Pages: 1568-1578(2022)
- Affiliations：
  
  1.State Key Lab of Millimeter Waves, School of Information Science and Engineering, Southeast University, Nanjing 210096, China
  2.Frontiers Science Center for Mobile Information Communication and Security, Southeast University, Nanjing 210096, China
  3.Purple Mountain Laboratories, Nanjing 211111, China
- Author bio：
  
  E-mail: yuyancao@aa.seu.edu.cn
  zjguo@seu.edu.cn
  ‡Corresponding author
- Funds：
- DOI：10.1631/FITEE.2200122
  CLC：
- Received：27 March 2022，
  
  Revised：2022-09-15，
  
  Published：0 October 2022
- Accepted：
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Yuyan CAO, Zijun GUO, Zhangcheng HAO. Planar dual-polarized millimeter-wave shared-aperture array antenna with high band isolation[J]. Frontiers of Information Technology & Electronic Engineering, 2022, 23(10): 1568-1578.
DOI：

Yuyan CAO, Zijun GUO, Zhangcheng HAO. Planar dual-polarized millimeter-wave shared-aperture array antenna with high band isolation[J]. Frontiers of Information Technology & Electronic Engineering, 2022, 23(10): 1568-1578. DOI： 10.1631/FITEE.2200122.

摘要

本文提出并设计了一种毫米波平面共口径阵列天线。通过集成基板集成波导（SIW）和带状线激励网络，将K波段天线嵌入至Ka波段天线内部。通过共享辐射口径减小天线尺寸，降低其剖面高度。所设计的Ka波段天线通过SIW腔体表面的一对平行缝隙辐射水平极化波，而K波段天线通过SIW腔体表面的蝴蝶结形缝隙辐射垂直极化波。两个波段的阵列天线可以共享物理口径进行辐射，且在两个频段都具有很好的隔离度。为了验证以上设计思想，我们设计了一款中心工作频率为19 GHz和30 GHz的8×8共口径阵列天线，并采用多层印刷电路板（PCB）技术进行加工制造。实测结果表明，该天线在K波段和Ka波段的−10 dB阻抗带宽分别为7.73%和大于20%，相应的隔离度分别高于60 dB和44 dB。所提出的共口径天线具有小尺寸、低剖面和高隔离度的优点，可应用于小型化毫米波无线通信系统。

Abstract

A planar millimeter-wave shared-aperture array antenna is proposed and designed in this paper. By composing the substrate integrated waveguide (SIW) and the stripline

the K-band antenna is embedded inside the Ka-band antenna to achieve a smaller size and a low profile by sharing an aperture. The Ka-band antenna radiates through the parallel slot pairs on the surface of the SIW cavities with horizontal polarization

while the K-band antenna radiates through the butterfly-shaped slots with vertical polarization

which are also designed on the surface. Then the two array antennas can radiate by sharing a common aperture with high isolation. To verify this idea

a prototype of an 8×8 shared-aperture array antenna has been designed with center frequencies of 19 and 30 GHz and fabricated using multilayer printed circuit board (PCB) technology. The measurement results show that the -‍10 dB impedance bandwidths in the K- and Ka-bands are 7.73% and >20%

and the corresponding isolations are higher than 60 and 44 dB

respectively. The proposed shared-aperture antenna has a small footprint

a low profile

and high isolation

and is a promising candidate to design compact millimeter-wave wireless systems.

关键词

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references

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