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An MMIC Wide-band Doubly Balanced Resistive Mixer with an Active IF Balun
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- Authors
- Jin-Cheol Jeong, In-Bok Yom, Kyung-Whan Yeom
- Issue Date
- 2010-09
- Citation
- European Microwave Conference (EuMC) 2010, pp.333-336
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- In this paper, we present a wideband doubly-balanced resistive mixer fabricated using a 0.5 μm GaAs p-HEMT process. Three baluns are employed in the mixer. Local oscillator (LO) and radio frequency (RF) baluns operating over an 8 to 20 GHz range were implemented with Marchand baluns. In order to reduce the chip size, the Marchand baluns were realized using a meandering multi-coupled line, and inductor lines were inserted to compensate for the meandering effect. Over a frequency range of 8 to 20 GHz, the amplitude and phase unbalances of the LO and RF baluns were less than 1 dB and 6°, respectively. A 0.3 x 0.5 mm2 IF balun was implemented through a DC-coupled differential amplifier. The measured amplitude and phase unbalances were less than 1 dB and 5°, respectively, from DC to 7 GHz. And the output third-order intercept (OIP3) and P1dB, at a frequency of 1 GHz, were 18 dBm and 6 dBm, respectively. The mixer is 1.7 x 1.8 mm2 in size, has a conversion loss of 5 to 11 dB, and an OIP3 of +10 to +15 dBm at 16 dBm LO power for the operating bandwidth.
- KSP Keywords
- Conversion loss, Coupled line, DC-coupled, Frequency range, GHz range, LO power, Radio frequency (rf), Resistive mixer, Third-order intercept, Wide band, differential amplifier