A single-chip multi-mode RF front-end circuit and module for W-CDMA, PCS, and GPS applications Huijung Kim1 , Changjoon Park1 , Sanghyeok Choi2 , Seonghan Ryu3 , Jongryul Lee4 , and Bumman Kim1 1 Department of Electrical Engineering, Pohang University of Science and Technology, Gyeongbuk, 790-784, Korea, Tel: +82-54-279-5584, Fax: +82-54-279-8115 E-Mail : bignose-postech.ac.kr, bmkim-postech.ac.k

Leaky Wave Lens Antenna for Wide/Multi Band Application A. Neto1 , S. Bruni1,2 , G. Gerini1 , M. Sabbadini3 , TNO Defence, Security and Safety, Den Haag 2597 AK, The Netherlands. E-mail: andrea.neto, simona.bruni, giampiero.gerini- tno.nl. Department of Information Engineering, University of Siena, 53100, Siena, Italy. E-mail: bruni-dii.unisi.it 3 European Space Research and Technology Center (EST

Experimental results of power amplifiers linearization using adaptive baseband digital predistortion E. Cottais, Y. Wang, S. Toutain IREENA Polytech'Nantes ­ Rue C. Pauc, BP 50609, 44306 Nantes cedex 3 ­ France Email: emmanuel.cottais-polytech.univ-nantes.fr Filter Fig. 1. Baseband temporal Hammerstein model for the amplifier. I. I NTRODUCTION In modern mobile telecommunications systems, the l

Spectral Regrowth Analysis at the Output of a Memoryless Power Amplifier with Multicarrier Signals E. Cottais, Y. Wang, S. Toutain IREENA Polytech'Nantes ­ Rue C. Pauc, BP 50609, 44306 Nantes cedex 3 ­ France Email: emmanuel.cottais-polytech.univ-nantes.fr This formula is a good approximation for a memoryless narrowband amplifier and is a commonly adopted model. Most of the publications dealing w

Low Profile S-Band Dual-Polarized Antenna for SDARS Application Young-Pyo Hong1, Jung-Min Kim1, Soon-Chul Jeong2, Dong-Hyun Kim2, Jong-Gwan Yook1 1 Department of Electrical and Electronic Engineering, Yonsei University, 134 Seodaemoon-Gu, Shinchon-Dong, Seoul, 120-749, Korea 2 Actipass Co. Ltd, 451, Hagal-Ri, Giheung-Eup, Yongin-Si, Kyunggi-Do, 449-906, Korea Tel: +82-2-2123-4618, E-mail: jgyook

Multiple Frequency Notched Planar Monopole Antenna for Multi-band Wireless Systems W.S.Lee, D.Z.Kim,K.J.Kim, K.S.Son,W.G.Lim and J.W.Yu Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 373-1 Guseong-Dong, Yuseong-Gu, Teajon, 305-701, Korea, e-mail:drjwyu-ee.kaist.ac.kr Abstract -- A multiple band-notched planar monopole antenna for multi-band wirel

Frequency-Tunable PIN Diode Switch for Software Defined Radio Shingo Tanaka1, Noritaka Taguchi1, Tsuneto Kimura2 and Yasunori Atsumi1 1 Otowave Laboratory Inc., 3-1 Hikari-no-oka, Yokosuka, Kanagawa, 239-0847, Japan, Phone : +81-46-840-1837 2 Yazaki Corporation, 1500 Mishuku, Susono, Shizuoka, 410-1194, Japan, Phone : +81-55-965-3208 performance of the switch is presented from the viewpoints of i

An Analog Mismatch Calibration System for Image-Reject Receivers Bo Shi and Michael, Yan Wah Chia Institute for Infocomm Research 20 Science Park Road, #02-21/25, TeleTech Park Singapore Science Park II Singapore 117674 Abstract -- The image-reject receiver is an architecture that ideally passes the desired signal and rejects its image. However, due to mismatches in the signal path, the imagerejec

Proposed FDSS UWB Communications System Bazil Taha-Ahmed Departamento Sistemas, Señales y Radiocomunicaciones, ETSI Telecomunicación, Universidad Politécnica de Madrid Ciudad Universitaria, Madrid, 28040, Spain E-mail: bazil-gr.ssr.upm.es Abstract -- A proposed 440 Mbps FDSS (Frequency Division Spread Spectrum) UWB system is presented. Also, the generation of the FDSS signal is given. System requi

A Study on the Effect of the Adjacent Channel Interference between Portable Internet System Operators Ho-Kyung Son Electronic Telecommunication Research Institute, Radio Technology Group 161 Gajeong-dong, Yuseong-gu, Daejeon, 305-350, KOREA Abstract -- In Korea, 2.3GHz frequency band is allocated for a new mobile data service called the portable internet service and assigned to 3-operators. So, i