A Balanced Sub-Harmonic Cold FET Mixer for 40GHz Communication Systems
نویسندگان
چکیده
This paper reports a novel MMIC balanced sub-harmonic cold FET mixer for MVDS applications using 0.15mm GaAs pHEMT. The mixer, which includes a LO buffer amplifier, was optimized for highly linear upconversion performance in the 42-43.5GHz RF band, 19.520.5GHz LO band and 2.45-3.45 GHz IF band. A dedicated simulation method has been developed to optimize conversion loss and determine optimum matching. To achieve better (2LO-to-RF) isolation a specific balanced architecture for sub-harmonic mixing has been elaborated. The first measurements of the fabricated MMIC circuit show 13,5dB conversion losses associated to high IF input power at 1dB compression of 15dBm, and (2LO-to-RF) rejection of 20dB in reasonable agreement with simulation results.
منابع مشابه
A 60 GHz double balanced sub-harmonic mixer MMIC
We present the design and measured results for a 60 GHz double balanced sub-harmonic MMIC mixer fabricated using the TRW 0.15μm gate length GaAs pHEMT foundry process. The sub-harmonic mixer architecture eliminates the need for costly mm-wave sources that are usually required with conventional fundamental frequency mixers. The mixer has been integrated into a coaxial package and a measured conv...
متن کاملComparative Study of Broadband RF Subharmonic Mixers in Submicron Technology
With the advancements in wireless technologies a lot of concern has been given for designing RF circuits and the designers are trying to introduce new topologies to achieve better outputs whether be at transmitter or receiver section of a communication system and this in-turn has led to the development of individual components of these systems. In this paper, a review of various broadband confi...
متن کاملFirst results of a 1.2 THz MMIC sub-harmonic mixer based GaAs Schottky diodes for planetary atmospheric remote sensing
We present here the first measurement results of a 1200 GHz heterodyne receiver front-end prototype based on this Schottky GaAs membrane technology. The 1200 GHz subharmonic mixer design, previously reported, uses a suspended MMIC GaAs membrane that feature a balanced pair of planar Schottky diodes and an on-chip MIM capacitor for DC forward biasing capabilities. The possibility to bias the sub...
متن کاملA 38 to 44GHz sub-harmonic balanced HBT mixer with integrated miniature spiral type marchand balun
This work presents an active balanced sub-harmonic mixer (SHM) using InP double heterojunction bipolar transistor technology (DHBT) for Q-band applications. A miniature spiral type Marchand balun with five added capacitances for improved control of amplitude and phase balance is integrated with the SHM. The measured results for the SHM demonstrates a conversion gain of 1.2 dB at an RF frequency...
متن کاملA 150 to 220 GHz Balanced D 50 nm Metamorphic HE
A coplanar millimeter wave doubler MMIC covering the entire G-band was developed. Based on a 50 nm metamorphic HEMT technology, the circuit demonstrates an output power of more than –12 dBm between 150and 220 GHz for an input power of 0 dBm. By increasing the input power to 12 dBm an output power exceeding 0 dBm was obtained in the frequency range between 180and 220 GHz. Good fundamental reject...
متن کامل