In this letter, a novel concept for the dielectric resonator functioning as a differential antenna and as an independently controllable dual-band filter simultaneously is proposed for the first time. The multifunctional design takes full advantage of the virtual and reflection grounds of the differential dielectric resonator antenna (DDRA). The antenna and filter functions share a single module and a physical ground, making the proposed design compact and cost effective. In addition to high isolation between the two functions, the filter part shows two independently adjustable passbands. For demonstration, a prototype is designed, fabricated, and measured. The DDRA is designed at 2.5 GHz with an impedance bandwidth of 2.7% and the realized gain of 4.5 dBi. The dual-band filter operates at the center frequencies of 2.16 GHz and 3.51 GHz with 3 dB bandwidths of 13% and 7%, respectively. A good agreement is observed between the simulated and measured results.

中文翻译：

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差分介质谐振器天线在独立可控双带滤波器中的应用


在这封信中，首次提出了介电谐振器同时充当差分天线和独立可控双带滤波器的新概念。多功能设计充分利用了差分介质谐振器天线（DDRA）的虚拟地和反射地。天线和滤波器功能共享单个模块和物理接地，使得所提出的设计紧凑且具有成本效益。除了两个功能之间的高度隔离之外，滤波器部分还显示两个独立可调的通带。为了进行演示，设计、制造和测量了原型。 DDRA 设计频率为 2.5 GHz，阻抗带宽为 2.7%，实现增益为 4.5 dBi。双频带滤波器工作在 2.16 GHz 和 3.51 GHz 的中心频率，3 dB 带宽分别为 13% 和 7%。模拟结果和测量结果之间观察到良好的一致性。