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A Study on the Design of Dual-Band Mixer for WLAN 802.11a/b/g Applications  

Park Wook-Ki (Department of Electronic Engineering, InHa University)
Go Min-Ho (Department of Electronic Engineering, InHa University)
Kang Suk-Youb (Department of Electronic Engineering, InHa University)
Park Hyo-Dal (Department of Electronic Engineering, InHa University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.16, no.11, 2005 , pp. 1106-1113 More about this Journal
Abstract
This paper presents a dual-band mixer for multi-standards of IEEE 802.1la/b/g using a single local oscillator, so as to improve the defects of legacy systems. Those systems have duplicate local oscillators and mixers to handle dual band signals, increasing complexity of system and power loss. The proposed circuit shows 11.6 dB, 16.8 dB of conversion loss and 8.77 dBm, 12.5 dBm of IIP3(Input 3rd Intercept Point) for respective bands when the two RF inputs of 2.452 and 5.260 GHz are down-converted to the identical 356 MHz If frequency. The RF-LO isolations are measured 36 dB, 41 dB at each frequencies and over 50 dB of LO-IF isolations are achieved at all cases.
Keywords
Wireless LAN; Dual-Band Mixer; Mixer; Anti-Parallel Diode Mixer; Variable Bias;
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