Low power consumption and high gain ultra‐wide‐band low noise amplifier

Abstract

A low power consumption and high gain ultra-wide-band (UWB) low noise amplifier (LNA) utilizing a common-gate stage connected with a common-source stage by using current-reused structure is proposed. The implemented LNA exhibits a maximum power gain of 14.2 dB with a total (core) power consumption of 7.2 mW (3.8 mW) under a 1.5 V power supply. A minimum noise figure of 4.1 dB was obtained within 3-dB bandwidth of 2.7-8.2 GHz. The proposed UWB LNA presents the highest ratio of the power gain to power consumption among the compared papers. ABSTRACT: An improved wideband planar inverted-F antenna (PIFA)is investigated in this work. The meander line structure is introduced into the conventional PIFA and significant bandwidth improvement can be observed. Two improved PIFA antennas with different meander line structures are designed and fabricated; the measured results show good agreement with the simulations, demonstrating 23.1 and 40% bandwidth at Ϫ10 dB return loss, about 131 and 300% bandwidth enhancement, respectively, compared with the original PIFA (less than 10%). Obviously, the proposed antenna demonstrates good performances (especially in bandwidth), compact size, low profile, and low cost; it is thus expected to find possible applications in wireless communication systems.

A compact wideband CMOS LNA with low power consumption

“…Current‐reuse UWB LNAs were previously discussed in Refs. 5–8. It satisfies low power consumption requirements.…”

“…One of the major challenges in a UWB system is the design of a wideband low noise amplifier (LNA) covering the entire band of interest. In recent years, several LNAs with wideband characteristic and low power consumption have been demonstrated for UWB application [4–9]. To reduce power consumption with adequate voltage gain, the current‐reuse technique has usually been adopted [10].…”

“…It can be classified as two types. One is current‐reuse topology, which uses a two‐stage cascade to share the same current source [5, 6]. When the DC current is through, the circuit topology is regarded as a cascode structure, which reduces power dissipation by using the same current source.…”