CFP last date
01 July 2024
Call for Paper
August Edition
CAE solicits high quality original research papers for the upcoming August edition of the journal. The last date of research paper submission is 01 July 2024

Submit your paper
Know more
Reseach Article

Building Radio Frequency Transmitter for LTE User Equipment

by Marwa Mansour, R.S. Ghoname, Abdelhalim Zekry
Communications on Applied Electronics
Foundation of Computer Science (FCS), NY, USA
Volume 2 - Number 4
Year of Publication: 2015
Authors: Marwa Mansour, R.S. Ghoname, Abdelhalim Zekry

Marwa Mansour, R.S. Ghoname, Abdelhalim Zekry . Building Radio Frequency Transmitter for LTE User Equipment. Communications on Applied Electronics. 2, 4 ( July 2015), 1-9. DOI=10.5120/cae2015651698

@article{ 10.5120/cae2015651698,
author = { Marwa Mansour, R.S. Ghoname, Abdelhalim Zekry },
title = { Building Radio Frequency Transmitter for LTE User Equipment },
journal = { Communications on Applied Electronics },
issue_date = { July 2015 },
volume = { 2 },
number = { 4 },
month = { July },
year = { 2015 },
issn = { 2394-4714 },
pages = { 1-9 },
numpages = {9},
url = { },
doi = { 10.5120/cae2015651698 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
%0 Journal Article
%1 2023-09-04T19:40:09.090670+05:30
%A Marwa Mansour
%A R.S. Ghoname
%A Abdelhalim Zekry
%T Building Radio Frequency Transmitter for LTE User Equipment
%J Communications on Applied Electronics
%@ 2394-4714
%V 2
%N 4
%P 1-9
%D 2015
%I Foundation of Computer Science (FCS), NY, USA

Software defined radio implementation is required for LTE radio transceivers. An SDR consists of an RF front end and a digital processor platform DSP. This paper is devoted to the design and implementation of the front end which is divided into an active and a passive front end. The active front end consists of a frequency synthesizer, an I/Q modulator and an RF power amplifier while the passive front end includes the antenna and band pass filter. The paper presents the design, implementation, and testing of the LTE transmitter where the passive front end components are made of a microstrip circuits while the active components are selected from the off shelf components available in the semiconductor market. For this, the antenna and filter were printed using FR-4 substrate material with dielectric constant of ɛr =4.4, thickness of h = 1.6 mm and loss tangent tan δ = 0.025. The frequency synthesizer is selected with step size of 200 KHz and frequency range from 0.37GHz to 5.7GHz, so that it covers all LTE bands. The selected direct conversion I/Q modulator has frequency range from 0.2GHz to 6GHz. It allows direct modulation of an RF signal using differential baseband I and Q signals. The selected RF Power Amplifier has two modes of operation, a high power mode (HPM) and low power mode (LPM).The PA achieves gain of about 25.5 dB and 14.5 dB in HPM and LPM respectively over the 60 MHz bandwidth from 1920MHz to 1980MHz. The performance of each component and the whole transmitter is measured using VNA (E8719A), EXA X-Series Signal Analyzer (N9010A), Agilent E8267D PSG Vector Signal Generator, and spectrum analyzer.

  1. M. Rumney, LTE and the Evolution to 4G Wireless, Agilent Technology, (2009).
  2. Zhang Weifeng, Huang Jiwei, Wang Riyan, Fang Min, and Li Zhengping, “A 127mW SAW-less LTE Transmitter with LC-load Bootstrapped Quadrature Voltage Modulator in 130nm RFCMOS ”, pp.2135-2138, IEEE, 2012.
  3. Takahiro Nakamura, Naoki Kitazawa, Kaoru Kohira, and Hiroki Ishikuro, “A SAW-Less LTE Transmitter with High-Linearity Modulator using BPF-Based I/Q Summing”, pp. 387-390, IEEE, 2014.
  4. Martha Liliana Suarez Penaloza, Václav Valenta, Geneviève Baudoin, , Martine Villegas, and Roman Maršálek, “High efficiency LTE transmitter considering a polar PWM architecture and RF front-end blocks”, Proceedings of the 3rd European Wireless Technology Conference, September 2010, Paris.
  5. LTE and WCDMA standard specifications: 3GPP TS 25.101 V9.1.0(2009-09).
  6. GSM / EDGE standard specifications: 3GPP TS 45.005 V8.3.0 (2008-11). 3rd Generation Partnership Project; Technical Specification Group GSM/EDGE; Radio Access Network; Radio transmission and reception (Release 8).
  7. P. Reynaert and M. Steyaert. RF Power Amplifiers for Mobile Communications. Ed. by M. Ismail. Springer, 2006.
  8. 3GPP TS 36.101-v9.4.0, E-UTRA user equipment radio transmission and reception.
  9. B. G. Goldberg, H. Eisenson, “Frequency Synthesizer Strategies for Wireless,” Microwave Journal, June 1993, 24, 26, 31, 34, 36, 39-40.
  10. Ultralow Noise and Spurious 0.37GHz to 6.39GHz Integer-N Synthesizer with Integrated VCO, Data Sheet,
  11. 200MHz to 6000MHz Quadrature Modulator with Ultrahigh OIP3, Data Sheet, LTC5588-1.
  13. Marwa Mansour, Abdelhalim Zekry, and R.S. Ghoname, “A Passive Front End of Radio Transceivers for LTE Bands”, International Journal of Computer Applications (IJCA), vol. 114 – no. 8, pp.35-42, March 2015.
  14. J. S. Yun, J. S. Park, D. Ahn, “A design of the novel coupled-line band pass filter using defected ground structure with wide stopband performance,” IEEE Transaction on Microwave Theory and Techniques, Vol.50, No.9, pp.2037~2043, Sept. 2002.
  15. C. A. Balanis, Antenna theory, 3rd edition, John Wiley, New York, 2005.
  16. Henderson, B. C., “Predicting Intermodulation Suppression in Double-Balanced Mixers,” Watkins- Johnson Company Technical Notes. Vol. 10, No. 4, July/ August 1983.
  17. Practical Rf Circuit Design for Modern Wireless Systems – R. Gilmore, L. Besser.
Index Terms

Computer Science
Information Sciences


LTE SDR RF transmitter frequency synthesizer IQ Modulator PA BPF HPM LPM DGS CST Zeland IE3D and VNA.