A Wide-Band Low-Profile Antenna for a High-Integration Phased Array System
Author:
Liu Haipeng12ORCID, Liu Juan12, Huang Jin1, Han Chunhui2, Chen Bo2ORCID, Liu Yuhe2, Xiang Yujie2
Affiliation:
1. School of Mechano-Electronic Engineering, Xidian University, Xi’an 710071, China 2. Beijing Institute of Remote Sensing Equipment, Beijing 100039, China
Abstract
In this paper, a wide-band, low-profile antenna is presented for a high-integration phased array system. The proposed antenna, implemented using a tightly coupled array, operates over roughly the X-K frequency band and is performant at 8 GHz–18.5 GHz. The antenna can scan to ±60 degrees in both the E- and H-planes. Compared to previous tightly coupled antennas with smaller element spacing, the antenna in this paper reaches 9.4 mm, which corresponds to 0.58 λ of high frequency, suitable for engineering application conditions in production. The antenna can be soldered to BGA T/R chips in this space. Additionally, to facilitate flexible assembly for large arrays, the antenna is manufactured modularly using four elements and its parasitic radiation is analyzed. Then, a method for repressing parasitic radiation is presented. Finally, the antenna is fabricated and measured in a microwave chamber, exhibiting an excellent pattern and scanning radiation. The measured performance agrees with the full-wave finite array simulations.
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