International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC) 2009, pp.1-3
Publisher
IEEE
Language
English
Type
Conference Paper
Abstract
A single-side band (SSB) transmitter with 60-dB image rejection ratio (IRR) is presented in InGaP/GaAs heterojunction bipolar transistor (HBT) technology. To achieve a high image rejection, not only matches between in (I) and quadrature (Q) blocks but also optimal mixer driving is considered. Polyphase filter (PPF) design and its operation for better IRR are shown. To get well matched I/Q signals, Gilbertcell mixers in the up-converter are operated as a linear multiplier by selecting a proper local oscillator (LO) power. The designed SSB transmitter exploits Hartley topology and it consists of active baluns, two-stage PPFs at intermediate frequency (IF) and LO frequency, double balanced I/Q mixers and current mode logic type summer. With 140-MHz IF and 1060-MHz LO frequency, proposed design demonstrates image (920 MHz) rejection ratio of better than 60 dB simultaneously achieving gain and output P1dB of 30 dB, -1 dBm respectively. The measured results are in good agreement with simulation results.
KSP Keywords
Active baluns, Current mode logic, Current-mode(CM), GaAs heterojunction bipolar transistor, Heterojunction Bipolar Transistors(HBTs), I/Q mixers, InGaP/GaAs HBT, InGaP/GaAs heterojunction, Intermediate frequency, Local Oscillator, Polyphase Filter(PPF)
Copyright Policy
ETRI KSP Copyright Policy
The materials provided on this website are subject to copyrights owned by ETRI and protected by the Copyright Act. Any reproduction, modification, or distribution, in whole or in part, requires the prior explicit approval of ETRI. However, under Article 24.2 of the Copyright Act, the materials may be freely used provided the user complies with the following terms:
The materials to be used must have attached a Korea Open Government License (KOGL) Type 4 symbol, which is similar to CC-BY-NC-ND (Creative Commons Attribution Non-Commercial No Derivatives License). Users are free to use the materials only for non-commercial purposes, provided that original works are properly cited and that no alterations, modifications, or changes to such works is made. This website may contain materials for which ETRI does not hold full copyright or for which ETRI shares copyright in conjunction with other third parties. Without explicit permission, any use of such materials without KOGL indication is strictly prohibited and will constitute an infringement of the copyright of ETRI or of the relevant copyright holders.
J. Kim et. al, "Trends in Lightweight Kernel for Many core Based High-Performance Computing", Electronics and Telecommunications Trends. Vol. 32, No. 4, 2017, KOGL Type 4: Source Indication + Commercial Use Prohibition + Change Prohibition
J. Sim et.al, “the Fourth Industrial Revolution and ICT – IDX Strategy for leading the Fourth Industrial Revolution”, ETRI Insight, 2017, KOGL Type 4: Source Indication + Commercial Use Prohibition + Change Prohibition
If you have any questions or concerns about these terms of use, or if you would like to request permission to use any material on this website, please feel free to contact us
KOGL Type 4:(Source Indication + Commercial Use Prohibition+Change Prohibition)
Contact ETRI, Research Information Service Section
Privacy Policy
ETRI KSP Privacy Policy
ETRI does not collect personal information from external users who access our Knowledge Sharing Platform (KSP). Unathorized automated collection of researcher information from our platform without ETRI's consent is strictly prohibited.
[Researcher Information Disclosure] ETRI publicly shares specific researcher information related to research outcomes, including the researcher's name, department, work email, and work phone number.
※ ETRI does not share employee photographs with external users without the explicit consent of the researcher. If a researcher provides consent, their photograph may be displayed on the KSP.