Title :
A 2.4GHz CMOS front-end having improved antenna isolation for diversity
Author :
Kwon, Yong-Il ; Lee, Kyung-Hee ; Park, Ta-Joon ; Lee, Sung-Soo ; Kim, Hak-Sun ; Lee, Hai-Young
Author_Institution :
Ubiquatous Conversions team, Samsung Electro-Mech., Suwon
Abstract :
A front-end having improved antenna isolation for diversity in a 0.18 mum CMOS technology is presented. In order to reduce the external components, two switches for antenna diversity are integrated in front of LNA on the chip. A stacked inductor technique is adopted to reduce the chip area. The simulation and measurement results show that the front-end (LNA, Mixer) can achieve a voltage gain of 33.5 dB, a noise figure (NF) of 3.8 dB and 23 dB of the isolation between antennas is achieved while consuming 3.9 mW with a 1.8 V power supply. The NF includes the loss of BALUN, BPF and switches.
Keywords :
CMOS integrated circuits; MMIC; UHF integrated circuits; antennas; diversity reception; low noise amplifiers; radiocommunication; CMOS front-end; LNA; antenna isolation; frequency 2.4 GHz; gain 33.5 dB; noise figure 23 dB; noise figure 3.8 dB; power 3.9 mW; size 0.18 mum; stacked inductor technique; voltage 1.8 V; Antenna accessories; Antenna measurements; CMOS technology; Gain measurement; Inductors; Isolation technology; Noise measurement; Power measurement; Semiconductor device measurement; Switches;
Conference_Titel :
Microwave Conference, 2008. APMC 2008. Asia-Pacific
Conference_Location :
Macau
Print_ISBN :
978-1-4244-2641-6
Electronic_ISBN :
978-1-4244-2642-3
DOI :
10.1109/APMC.2008.4958337
