V-band CPW 3-dB tandem coupler using air-bridge structure

被引:29
作者
Moon, SW [1 ]
Han, M [1 ]
Oh, JH [1 ]
Rhee, JK [1 ]
Kim, SD [1 ]
机构
[1] Dongguk Univ, Millimeter Wave Innovat Res Ctr, Seoul 100715, South Korea
基金
欧洲研究理事会;
关键词
air-bridge; coplanar waveguide (CPW); tandem coupler; wideband;
D O I
10.1109/LMWC.2006.872151
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We present a uniplanar coplanar waveguide 3-dB tandem coupler operating at V-band frequencies. The uniplanar structure is monolithically fabricated by using two-section parallel-coupled lines and air-bridge crossovers replacing the conventional multilayer or the bonded structures. Due to an optimized tandem structure and nonbonded crossovers minimizing the parasitic components, a maximum coupling of 2.5 dB is measured at 62 GHz with a 2-dB bandwidth of 83%, while a high directivity factor of 33 dB is simultaneously obtained at 58-62 GHz. Over the entire design frequency range of 30-90 GHz, we achieve good phase unbalance of 90 +/- 6.0 degrees, return loss, and isolation lower than -23 and -16 dB, respectively.
引用
收藏
页码:149 / 151
页数:3
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