A Compact and Broadband Differential Microstrip Line to Rectangular Waveguide Transition Using Dipole Antenna

作者：Yang, Ziqiang^*; Yang, Tao; Liu, Yu; Peng, Hao

来源：Journal of Infrared Millimeter and Terahertz Waves, 2016, 37(6): 582-591.

DOI：10.1007/s10762-016-0253-1

• Differential microstrip line (DML)
• Transition
• Rectangular waveguide
• Dipole antenna

In this paper, a compact full Ka-band differential microstrip line (DML) to rectangular waveguide transition is proposed. The dipole antenna with semi-elliptic arms is introduced to transform the differential mode of DML to the TE10 mode of the rectangular waveguide directly. The two arms of the dipole antenna are connected together by a shorting strip to reduce the size of the dipole. Compared with the DML-to-waveguide transition using the fin-line topology, the size of the proposed transition has been reduced by 86 %. To verify this transition, a back-to-back structure is fabricated and tested. It provides a return loss of better than 15.2 dB and an insertion loss of 0.73 to 1.07 dB within a wide frequency range from 26.5 to 40 GHz. The measurement results show good agreement with the simulation results. Furthermore, a tolerance analysis is also performed via the simulation to prove that this transition is robust in the fabrication and mechanical assembly.

• 出版日期2016-6
• 单位电子科技大学