Abstract: The effect of using a tuning inductance on the performance of a Gilbert cell-based two level transistor CMOS sub-harmonic mixer is investigated. The tuning inductor used between the RF and LO switching stages causes conversion gain enhancement and noise figure improvement. Additionally, it compensates LO distortion due to the phase mismatch of LO signals in the sub-harmonic mixer. The...

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...

The characterization of a 1.1-1.7 THz planar Schottky-diode mixer is described. Initial measurements yielded a mixer noise temperature of 5900 K (DSB) and conversion loss of 12 dB (DSB) at 1.57 THz. The responsivity of the mixer was measured to be higher than 200-400 V/W over the frequency range 1.1-1.5 THz. Also, the same diode was used as a 2nd harmonic mixer as part of a solid-state 1.45-1.5...

Absrracl A highly linear CMOS RF amplifier and mixer circuits adopting MOSFET transconductance linearization bv linearlv suoemosine several commonTherefore it is very important to linearize MOSFET transconductance for both RF amplifier and mixer circuits. We have shown that multide eated transistor (MGTR) 111 ~ _ . source FET transistors in parallel, combined with some additional circuit techni...

A time-varying theory of Volterra series is developed and applied in the sampled-data domain to solve for harmonic and intermodulation distortion of a MOS-based track-and-hold sampling mixer with a nonzero fall-time LO waveform. Distortion due to sampling error is also calculated. These results, when combined with the continuous-time solution, quantify harmonic and intermodulation distortion of...

Frequency stabilization of a THz quantum cascade laser (QCL) to the harmonic of a microwave source has been accomplished using a Schottky diode waveguide mixer designed for harmonic mixing. The 2.32 THz, 1.0 milliwatt CW QCL is coupled into the signal port of the mixer and a 110 GHz signal, derived from a harmonic of a microwave synthesizer, is coupled into the IF port. The difference frequency...

A planar millimeter-wave third-harmonic mixer with low conversion loss is proposed. The mixing circuit consists of a substrate-integrated waveguide (SIW) balun, a pair of diodes, a diplexer and microstrip matching circuit. The mixer is ideal for use as down-converter and up-converter. For a fixed intermediate frequency (IF) of 2 GHz, the mixer has an up-conversion loss of 14.5-15.6 dB and a dow...

Mixer is one of the significant components of the radio frequency transceiver that translate baseband signal into RF and vice versa. In this paper, 2.4 GHz double balanced Gilbert Cell Mixer topology was simulated to study its important properties such as Conversion Gain, Linearity, Noise Figure and Port Isolation. Further, a band pass filter is added in to the design at IF port so as to reject...

Accompany with the rapid development of millimeter-wave science and technology, subharmonically pumped mixers has received more and more attention. In this study, a balanced sub-harmonic fixtuned mixer is designed based on combination of linear/nonlinear circuit simulation. It is realized based on rogers substrate process to minimize the cost and simplify the assembly. The mixer works in the 91...