Abstract
In this paper, we propose a high-durability X-band patch antenna with a coplanar waveguide (CPW) feeding network that can directly connect the upper antenna and the lower transmitting receiver modules without additional cabling. To improve the durability of the antenna, both the sub miniature push-on (SMP) connector and the feed-pin are separated through the CPW layer. This separated structure can minimize the deterioration of the antenna performance when the unwanted movement of the SMP connector occurs from external shocks. To verify the design feasibility, the reflection coefficient and radiation patterns of the proposed antenna are measured in a full anechoic chamber. The reflection coefficient of the proposed antenna is −27 dB at 10 GHz, and the operating frequency bandwidth (|Γ| < −10 dB) is 4.7% (9.82~10.29 GHz) in X-band. The proposed antenna has a maximum gain of 5.7 dBi at the bore-sight direction. In addition, the durability evaluations of the proposed design according to unwanted SMP connector movements provoked by external shocks are investigated using Monte Carlo simulations. The results demonstrate that the proposed high-durability antenna design is suitable for military ship applications that involve exposure to various external shocks.
Highlights
In recent years, there has been an increasing demand for the use of X-band array antennas in military ship radar systems for detecting targets, navigation, and safety [1,2,3,4]
Because ships are frequently damaged by various external shocks, the antenna element of the radar must be designed to be structurally stable
Patch-type antennas with a low profile and reduced radar cross-section characteristics are considered to be more suitable for military ship radar systems [12,13,14]
Summary
There has been an increasing demand for the use of X-band array antennas in military ship radar systems for detecting targets, navigation, and safety [1,2,3,4]. In some design cases, sub miniature push-on (SMP) connectors mounted on the bottom surface of the antenna layer, are required to directly connect both the antenna and the TRM without complicated cabling [24]. We propose a high-durability X-band patch antenna with a coplanar waveguide (CPW) feeding network that can directly connect the upper antenna and the lower TRM without additional cabling.
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