A beamwidth reconfigurable linear array antenna utilizing three magneto-electric (ME) dipole antenna elements with no need for a complex feeding network is presented. In this design, the ME dipole antenna elements are differentially excited by three parallel transverse resonant slots etched on the broad wall of a substrate integrated waveguide (SIW) cavity. By symmetrically embedding four copper posts that are connected to varactor diodes between the adjacent slots, the electric field perturbation in the SIW cavity can be realized by manipulation of the varactors. In other words, altering bias voltage of all the varactors simultaneously could offer granular control over the excitation amplitude and phase of the antenna elements. Consequently, continuously variable beamwidth of the antenna can be obtained under electronic control. A fully operational prototype was designed, fabricated, and tested to validate the proposed design. Measured results indicate that the overlapped −10 dB impedance bandwidth of the proposed antenna is 19.6% and the half-power beamwidth (HPBW) in the E-plane is capable of varying from 39° to 107° within the operating frequency band.

中文翻译：

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波束宽度连续变化的差动馈线耦合的磁电偶极子天线

提出了一种利用三个磁电（ME）偶极子天线元件的束宽可重构线性阵列天线，不需要复杂的馈电网络。在这种设计中，ME偶极子天线元件由在衬底集成波导（SIW）腔体的宽壁上蚀刻的三个平行的横向谐振槽差分激励。通过在相邻槽之间对称地嵌入四个与变容二极管相连的铜柱，可以通过操纵变容二极管来实现SIW腔中的电场扰动。换句话说，同时改变所有变容二极管的偏置电压可以提供对天线元件的激励幅度和相位的精细控制。因此，可以在电子控制下获得天线的连续可变波束宽度。设计，制造和测试了功能完备的原型，以验证建议的设计。测量结果表明，拟议天线的重叠-10 dB阻抗带宽为19.6％，并且E平面中的半功率波束宽度（HPBW）能够在工作频带内从39°到107°变化。