Broadband and Low-Profile Microstrip Antenna Using Strip-Slot Hybrid Structure
Broadband and Low-Profile Microstrip Antenna Using Strip-Slot Hybrid Structure
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采用带槽混合结构的宽带薄型微带天线
DOI：
10.1109/lawp.2017.2763987
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发表时间：
2017-01-01
影响因子：
4.2
通讯作者：
Feng, Zhenghe
中科院分区：
文献类型：
--
作者：
Sun, Wangyu;Li, Yue;Feng, Zhenghe
本文提出了一种带-槽混合结构的低剖面微带天线，在0.06 λ（0）（λ（0）为自由空间中心工作波长）高度范围内，带宽可提高41%。所提出的天线由四个条，这是由三个窄槽分开。通过控制带和槽的尺寸，双模式，即，TM 10模和反相TA 4（20）模被激励和耦合以增加工作带宽。该微带-缝隙混合结构可以通过孔径耦合的Y形馈电微带线实现最佳阻抗匹配激励。所提出的天线的原型构造和测试。实验结果表明，当反射系数小于10 dB时，阻抗带宽为41%，工作带宽明显提高，且具有0.06 λ（0）的低剖面。
In this letter, a low-profile microstrip antenna with strip-slot hybrid structure is proposed to enhance the bandwidth up to 41% within a height of 0.06 lambda(0) (lambda(0) is the center operating wavelength in free space). The proposed antenna consists of four strips, which are separated by three narrow slots. By controlling the dimensions of the strips and the slots, dual modes, i.e., TM10 mode and antiphase TA4(20) mode, are excited and coupled to increase the operating bandwidth. The strip-slot hybrid structure can be excited with optimized impedance matching using an aperture-coupled Y-shaped feeding microstrip line. A prototype of the proposed antenna is constructed and tested. Experimental results show an impedance bandwidth of 41% for the reflection coefficient less than 10 dB, achieving an obvious improvement of operating bandwidth with a low profile of 0.06 lambda(0).