Topology Analysis and Design of Passive HEMT Millimeter-Wave Multiple-Port Switches

• Published in: IEEE transactions on microwave theory and techniques 2008-07, Vol.56 (7), p.1545-1554
• Main Authors: Ruei Bin Lai, Shih Fong Chao, Zuo Min Tsai, Lee, J., Huei Wang
• Format: Article
• Language: English
• Subjects: Applied sciences; Bandwidth; Circuit properties; Circuit topology; Communication switching; Design engineering; Design. Technologies. Operation analysis. Testing; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; FETs; HEMT; HEMTs; High electron mobility transistors; Insertion loss; Integrated circuits; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; Microwaves; Millimeter wave communication; Millimeter wave transistors; MMICs; monolithic microwave integrated circuit (MMIC); multiple port; Noise levels; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; single-pole single-throw (SPST); switch; Switches; Switching, multiplexing, switched capacity circuits; Topology
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/TMTT.2008.924352

This paper discusses different topologies for millimeter-wave (MMW) multiple-port switches, and analyzes the insertion loss, isolation, and limitation of bandwidth. It is observed the performances of a MMW multiple-port switch are decided by both multiple-port topology and the structure of the constituted unit single-pole-single-throw switches, but dominated by its topology. To verify the analysis, two types of multiple-port switch are designed, one is a distributed switch and the other is based on a filter-integrated switch, using different topologies. The net-type multiple-port topology based on a distributed switch demonstrates a measured insertion loss of 4-5 dB with isolation better than 25 dB in 48-65 GHz. In 43-66 GHz, the binary-ring multiple-port topology based on a filter-integrated switch shows a measured insertion loss of 3-4.5 dB with isolation better than 30 dB.