Title :
A wideband MMIC-compatible balun using offset broadside air-gap coupling
Author :
Lee, Sanghyo ; Kim, Hong-Teuk ; Kim, Sungwon ; Kwon, Youngwoo ; Seo, Kwang-Seok
Author_Institution :
Seoul Nat. Univ., South Korea
fDate :
3/1/2004 12:00:00 AM
Abstract :
A compact ultra-broadband MMIC-compatible uniplanar balun has been developed using offset air-gap coupler. The offset air-gap coupler presents tight coupling and low conductor loss, and thus allows the balun to show low loss at mm-wave frequencies. The measured insertion loss was less than 2 dB from 26 to 55 GHz, and amplitude and phase imbalance was less than ±1dB and 5°, respectively over a wide frequency range from 27 to 69 GHz.
Keywords :
CMOS integrated circuits; Global Positioning System; radio receivers; radio transmitters; radiofrequency integrated circuits; system-on-chip; CMOS; IF functions; MIM capacitor; RF front end; SoC; baseband logic; baseband processor; dual port SRAM; low-noise amplifier; mask ROM; mobile GPS; phase-locked loops; power consumption; power supply; radio; single-chip GPS receiver; substrate coupling noise; Air gaps; Bandwidth; Computer science; Conductors; Coupling circuits; Geometry; Impedance matching; MMICs; Microwave frequencies; Wideband;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2004.824817
