This paper proposes a compact 4×44 \times 4 filtering microstrip patch antenna array with Dolph- Chebyshev distribution implemented by multilayer structure. The proposed antenna array features good filtering performance but contains no extra filtering parts in the feeding or the radiating element. The whole antenna array consists of four 1×41 \times 4 antenna subarrays, each subarray is composed of four patch antennas which are coupled-fed by a single microstrip line. Inside the desired passband, by properly choosing the coupling area along the microstrip line, the patches are induced in-phase currents therefore achieving the excellent radiation characteristics. On the other hand, the four patches can’t be properly excited outside the passband which would enable radiation suppression performance. In order to implement a 4×44 \times 4 filtering microstrip patch antenna array with low sidelobe level (SLL), four subarrays are combined and fed by Dolphy-Chebyshev excitation method. Finally, the proposed antenna array is implemented, fabricated and measured. The maximum measured gain in the passband is 14.7 dBi, and the radiation suppression outside the passband is better than 25 dB.

中文翻译：

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具有Dolph-Chebyshev功率分配的紧凑型4×4滤波微带贴片天线阵列


本文提出了一种采用多层结构实现的紧凑型4×44×4滤波微带贴片天线阵列，其具有Dolph-Chebyshev分布。所提出的天线阵列具有良好的滤波性能，但在馈电或辐射元件中不包含额外的滤波部件。整个天线阵列由4个1×41×4天线子阵组成，每个子阵由4个贴片天线组成，这些贴片天线通过单条微带线耦合馈电。在所需的通带内，通过正确选择沿微带线的耦合面积，贴片会感应同相电流，从而实现优异的辐射特性。另一方面，四个贴片无法在通带之外正确激发，从而实现辐射抑制性能。为了实现具有低旁瓣电平(SLL)的4×44×4滤波微带贴片天线阵列，将四个子阵列组合并通过Dolphy-Chebyshev激励方法馈电。最后，实施、制造和测量了所提出的天线阵列。通带内最大实测增益为14.7 dBi，通带外辐射抑制优于25 dB。