Title :
Impedance-transforming, coupled-line 180/spl deg/ hybrid rings with frequency independent characteristics
Author :
Kian Sen Ang ; Yoke Choy Leong ; Chee How Lee
Author_Institution :
DSO Nat. Labs., Singapore, Singapore
Abstract :
A new impedance-transforming, 180/spl deg/ hybrid-ring using coupled-lines is presented. Its amplitude and phase balances as well as isolation between diagonal ports are theoretically perfect and frequency independent. This was achieved without using physical phase inverters on uniplanar structures. Instead, the ideal phase inversion between coupled-line structures is exploited. Simple design equations will be derived and validated by experimental results.
Keywords :
coupled transmission lines; impedance convertors; waveguide couplers; amplitude balances; coupled-line hybrid rings; design equations; diagonal ports; frequency independent characteristics; hybrid-ring coupler; ideal phase inversion; impedance-transforming hybrid rings; isolation; phase balances; power splitting; uniplanar structures; Coplanar waveguides; Coupling circuits; Equivalent circuits; Frequency; Impedance; Inverters; Microstrip; Power transmission lines; Slotline; Transmission line theory;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1212593
