Beam-steerable planar array antennas using varactor diodes for 60-GHz-band applications
Beam-steerable planar array antennas using varactor diodes for 60-GHz-band applications
复制标题
使用变容二极管的波束可控平面阵列天线，适用于 60 GHz 频段应用
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
T. Ohira
中科院分区：
文献类型：
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作者：
H. Tanaka;T. Ohira
在本文中，我们提出了低成本和紧凑的波束可调平面微带天线60 GHz的应用。该基板具有三个介电层，底部和中间介电层之间的接地平面，以及顶部介电层上的微带天线的辐射元件。辐射元件由基于微带到槽线过渡和槽线到微带过渡的电路串联馈电。充分利用同相和反相功率分配技术，研制了对称结构的馈电网络。在馈电网络中，使用变容二极管的移相器被插入以操纵波束方向。我们制作了天线，测量了天线特性，并评估了波束控制的性能。天线增益约为16 dBi，对于24单元天线，带宽大于4 GHz。实验结果表明，该波束可调天线在60 GHz频率下具有约7 °的波束可调能力。由于该天线的移相器由变容二极管组成，与有源相控阵不同，波束可控天线可以以低成本制造。
In this paper we present low-cost and compact beam-steerable planar microstrip antennas for 60-GHz applications. The substrates have three dielectric layers, a ground plane between the bottom and middle dielectric layers, and radiation elements of microstrip antennas on the top dielectric layer. The radiation elements are fed in series by a circuit based on the microstrip-to-slotline transition and the slotline-to-microstrip transition. A feed network of the symmetric structure is developed by fully using the in-phase and anti-phase power dividing techniques. In the feed network, phase shifters using varactor diodes are inserted to steer the beam direction. We fabricated the antennas, measured the antenna characteristics, and evaluated the performance in beam steering. The antenna gain is about 16 dBi, and the bandwidth is more than 4 GHz for a 24-element antenna. Experimental results show that the proposed beam-steerable antenna has the ability of about 7-degree beam steering at the frequency of 60 GHz. Since the phase shifters of this antenna consist of varactor diodes, unlike active phased arrays, the beam-steerable antenna can be fabricated at low cost.