A concurrent dual-band low-noise amplifier for K- and Ka-band applications in SiGe BiCMOS technology

Abstract

A 24/35-GHz BiCMOS concurrent dual-band low-noise amplifier (DBLNA) has been developed. The proposed concurrent DBLNA was designed using new active notch filters embedded into a wideband LNA. The concurrent DBLNA has measured peak gains of 21.9/16.6 dB at 23.5/35.7 GHz, respectively. The measured 3-dB bandwidths of the low and high pass-bands are 7.7 GHz (18.8-26.5 GHz) and 8.8 GHz (32.8-41.6 GHz), respectively. The best noise figures measured in the passbands are 5.1/7.2 dB at 22/35.6 GHz, respectively. The measured IIP 3 performances are -10.4/-8.3 dBm at 24/35 GHz, respectively.

A 20 GHz 1.9 dB NF LNA with distributed notch filtering for VSAT applications

“…6, in the worst case, the gain of the LNA with filtering at 20 GHz is compressed by 1 dB when there is a 2S.5 GHz blocker at about 6 dBm, whereas the ICPldB is around -11 dBm for the non-filtering LNA. This corresponds to an , and a filtering LNA [5] . For the pass-band performance, both LNA's in this work demonstrate lowest NF at K-band in silicon and with good overall performance.…”

“…This loss will directly influence the NF of the system. Active notch filters can be used to improve Q-factor [5] . However, it may suffer from the narrow notch bandwidth and the degradation on NF.…”

A K‐/Ka‐band concurrent dual‐band low‐noise amplifier employing a feedback notch technique with simultaneous passband gain and stopband rejection control

“…However, the dual‐band LNAs suffer from low SRR at stopband and large gain and NF imbalances between the passbands . The concurrent dual‐band LNA in uses two active notch filters to overcome the low Q ‐factor of the integrated inductors, but it requires additional area and/or power dissipation. The concurrent tri‐band LNAs in and exhibit good gain balance and SRRs by employing a feedback tri‐band load as compared to the previous works.…”

“…At microwave and millimeter-wave frequencies, to create apparent multiple passband and stopband responses, several concurrent multiband LNA topologies were reported in Ref. [1][2][3][4][5]. The transmission-line-based LC-ladder network 1 and synthetic quasi-TEM transmission lines 2 were employed to build the dual-band matching circuits.…”

“…2 Moreover, under certain weather conditions THz signal is less affected than infrared (IR) beams and also suffers less from scintillation effects caused by local refractions index change. 3 As micrometer wave with a shorter wavelength, THz has higher available bandwidth. Since it has enormous potential in ultra-broad band communication, there has been many reports utilizing THz signals for high-speed communication.…”