Compact Via-Coupling Fed Monopulse Antenna With Orthogonal Tracking Capability in Radiation Pattern
Compact Via-Coupling Fed Monopulse Antenna With Orthogonal Tracking Capability in Radiation Pattern
复制标题
具有辐射方向图正交跟踪能力的紧凑型过孔耦合馈电单脉冲天线
DOI：
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发表时间：
2020
影响因子：
4.2
通讯作者：
P. Rezaei
中科院分区：
文献类型：
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作者：
Seyed Amin Khatami;J. Meiguni;Ali Amn;P. Rezaei
在这封信中，一个紧凑的单脉冲天线工作在10 GHz。馈电网络由四个鼠道耦合器组成，它们在正交辐射平面（方位角和仰角）中产生和和差图案。重点是通过改进匹配电路来提高性能，以生成同相和异相激励，同时还保持非常高的零深度，这适用于跟踪目的。电磁能量通过通孔耦合结构从馈电网络传输到辐射器。采用对称通孔馈电贴片阵列，天线端口间互耦较低。在印刷电路板上制造所提出的天线的原型，并进行测试。测量和模拟结果之间的一个合适的协议。结果显示，差分工作模式下，−10 dB阻抗带宽为2.1%，仰角和方位角平面上的零陷深度分别为−24和−20 dB。
In this letter, a compact monopulse antenna operating at 10 GHz is presented. The feed network consists of four rat-race couplers, which generate sum and difference patterns in orthogonal radiation planes (azimuth and elevation). The focus is on improving the performance by improving the matching circuit to generate in-phase and out-phase excitations while also maintaining a very high null-depth, which is applicable for tracking purposes. The electromagnetic energy is transmitted from the feed network to the radiators through the via-coupling structure. Using the symmetrical via-fed patch array results in the low-mutual coupling between the antenna ports. A prototype of the proposed antenna is manufactured on a printed circuit board and is tested. A suitable agreement between the measurement and simulation results is obtained. The results show a −10 dB impedance bandwidth of 2.1%, as well as −24 and −20 dB null depths on the elevation and azimuth planes, respectively, in the difference mode of operation.