W‐band dual‐channel receiver with active power divider and temperature‐compensated circuit

Abstract

A W-band dual-channel receiver is presented for the frequency-modulated continuous wave radars. In order to improve the isolation between two RF channels, a compact active power divider is implemented by a dual-output local oscillator (LO) amplifier. The temperature-compensated circuit also mitigates the gain variation of the receiver according to the ambient temperature. The fabricated receiver integrated circuit shows a conversion gain of 16 dB, a noise figure of 6.4 dB, and an input 1 dB compression point of −13.4 dBm at RF frequency of 76.5 GHz and LO input power of −1 dBm. The channel-to-channel isolation is >33 dB and the conversion gain variation is as low as −0.031 dB/°C between −40 and 120°C. This is the first temperaturecompensated multi-channel receiver demonstration in W-band.

Oxidative chemical vapor deposition for synthesis and processing of conjugated polymers: a critical review

“…Ma et al reported that by using an organic molecule (N-DMBI) for doping of ntype CP (FDBPPV), better carrier mobility was achieved by enhancing molecular packing. 215 Another example is PEDOT with preferential edge-on orientation when doped with PSS, Tos, or OTf, [216][217][218][219][220] while favoring face-on orientation when doped with smaller counter ions (like chloride Cl À ). 52,140 Although there is no limitation in exploiting different doping agents in the oCVD method, it generally was not a center of attention and only a fraction of the dopants are used for synthesis in practice.…”

Design of Broadband W-Band Waveguide Package and Application to Low Noise Amplifier Module

“…Millimeter-wave frequencies including W-band (75-110 GHz) have short wavelengths and broad allocated bandwidth, which are beneficial for high resolution radars and high speed wireless communications [1][2][3][4][5]. In the millimeter-wave frequency range, a rectangular waveguide is generally adopted as a main transmission line instead of a coaxial cable due to the lower loss and easier manufacturability [6].…”

A Suspended Six-Port Transformer-Based Power Divider for 2.4 GHz Applications

“…The reported power dividers [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ] can be classified into active and passive types. Active power dividers usually use two common-drain FETs [ 13 ] or Darlington cell [ 14 ] topologies to achieve single-to-differential outputs by adopting advanced processes. Despite the advantage of compact size, active dividers are unsuitable for portable systems due to extra power dissipation.…”