In this paper a single-fed four-faced multidirectional compact antenna is introduced for 2.45 GHz indoor wireless applications. Firstly, a slotted patch antenna is designed to operate at 2.45 GHz and its equivalent circuit model is synthesized, and then 2 × 1 patch antenna arrays are modelled and placed over the four faces of a cube structure and the final cube antenna is called as 4 × 2 × 1 antenna array. Meanwhile, a 50Ω fed line is positioned at the bottom of this cube with a power dividing network for the feeding line. For this purpose, a T-junction power divider network is designed at the bottom layer of the cube structure. Besides, the RF switches are located at each arm of four faces to transfer microwave energy selectively to each individual antenna element. Therefore, the reflection and radiation characteristics of proposed compact antenna are analysed to improve the performance under various switching conditions by the numerical analysis. The possibility of controlling selective radiation in a given direction is confirmed. The main advantage of the proposed design is to have capability of radiation control while preserving the reflection coefficient stability by RF switches. Finally, the proposed compact antenna is fabricated using a conventional printed circuit technology and the radiation performance is tested by the experimental measurements conducted. It is observed that measurement results are in a good agreement with the numerical computation results.

本文介绍了一种用于 2.45 GHz 室内无线应用的单馈四面多向紧凑型天线。首先，设计工作在 2.45 GHz 的开槽贴片天线并合成其等效电路模型，然后建模 2×1 贴片天线阵列并放置在立方体结构的四个面上，最终的立方体天线称为 4 × 2 × 1 天线阵列。同时，50Ω馈线位于该立方体的底部，馈线具有功率分配网络。为此，在立方体结构的底层设计了一个T型结功率分配器网络。此外，射频开关位于四个面的每个臂上，以选择性地将微波能量传输到每个单独的天线元件。所以，通过数值分析，分析了所提出的紧凑型天线的反射和辐射特性，以提高各种开关条件下的性能。确认了在给定方向上控制选择性辐射的可能性。所提出设计的主要优点是具有辐射控制能力，同时保持射频开关的反射系数稳定性。最后，使用传统的印刷电路技术制造了所提出的紧凑型天线，并通过进行的实验测量来测试辐射性能。可以看出，测量结果与数值计算结果吻合较好。确认了在给定方向上控制选择性辐射的可能性。所提出设计的主要优点是具有辐射控制能力，同时保持射频开关的反射系数稳定性。最后，使用传统的印刷电路技术制造了所提出的紧凑型天线，并通过进行的实验测量来测试辐射性能。可以看出，测量结果与数值计算结果吻合较好。确认了在给定方向上控制选择性辐射的可能性。所提出设计的主要优点是具有辐射控制能力，同时保持射频开关的反射系数稳定性。最后，使用传统的印刷电路技术制造了所提出的紧凑型天线，并通过进行的实验测量来测试辐射性能。可以看出，测量结果与数值计算结果吻合较好。所提出的紧凑型天线是使用传统的印刷电路技术制造的，并通过进行的实验测量来测试辐射性能。可以看出，测量结果与数值计算结果吻合较好。所提出的紧凑型天线是使用传统的印刷电路技术制造的，并通过进行的实验测量来测试辐射性能。可以看出，测量结果与数值计算结果吻合较好。