C波段LTCC无通孔微型Lange耦合器的研究

Study on a Miniature Lange Coupler without via Hole in C Band Based on LTCC

研究了一种C波段LTCC无通孔微型Lange耦合器,其结构紧凑,尺寸小。LTCC叠层技术是实现高性能、高可靠、微型化微波元件的主流技术之一,尤其是在提高电路集成度方面。Lange耦合器由于其特殊的结构使得其可以实现宽频带、高性能。设计、制作了一种中心频率为4GHz的宽带3dB Lange耦合器,尺寸仅为7.0mm×2.2mm×1.4mm。在2.0～6.0GHz频带内测试结果如下:插入损耗<0.3dB,反射损耗<21dB,隔离>27dB,相位平衡<90±3°,最大承受功率<40W(连续波)。测试与仿真结果较吻合,验证了研究结果的一致性。

In this paper, a miniature Lange coupler without via hole in C band which has the compact structure and small size is studied based on LTCC technology. LTCC is one of the mainstream technologies to achieve microwave elements with high performance, high reliability and miniaturized benefit for its special structure. It is useful specially in increasing RF module integration. Lange couplers can achieve wide bandwidth and high performance. A broadband 3dB Lange coupler is designed and fabricated with a center frequency of 4GHz and the size is only 7.0mm^2.2mm^l. 4mm. The test results of the coupler within 2GHz- 6GHz frequency range as follows： insertion loss 〈0.3dB, return loss 〈 21dB, isolation 〉 27dB, phase balance 〈90＋3~, maximum handle power 〈40W（CW）. It is confirmed that the experimental results are found to be in good agreement with simnlated results.