Title :
A broadband single balanced diode mixer using a wideband rat-race hybrid with vertical coupling structure
Author :
Lee, Myeong-Gil ; Yun, Tae-Soon ; Nam, Hee ; Kim, Ki-Byoung ; Lee, Jong-Chul ; Wu, Qun
Author_Institution :
RFIC Res. & Educ. Center, Kwangwoon Univ., Seoul, South Korea
Abstract :
In this paper, a broadband single balanced mixer is presented using a wideband rat-race implementation by vertical coupler. Frequency is selected as 1.5∼3 GHz for RF, 1.64∼3.14 GHz for LO, and 140 MHz for IF signals. When LO signal with 6 dBm at 2.7 GHz is injected, a conversion loss of 7.5 dB and RF to LO isolation of -30 dB are obtained. Also, an average conversion loss of 10 dB and RF to LO isolation of -27 dB are obtained for frequency band of 1.5∼3 GHz.
Keywords :
microwave mixers; waveguide couplers; 1.5 to 3 GHz; 1.64 to 3.14 GHz; 10 dB; 140 MHz; 2.7 GHz; 7.5 dB; LO signal; broadband single balanced diode mixer; conversion loss; vertical coupler; vertical coupling structure; wideband rat-race hybrid; Bandwidth; Capacitance; Coupling circuits; Diodes; Impedance; Microstrip; Mixers; RF signals; Radio frequency; Wideband; broadband mixer; vertical coupler; wideband rat-race;
Conference_Titel :
Microwave Conference Proceedings, 2005. APMC 2005. Asia-Pacific Conference Proceedings
Print_ISBN :
0-7803-9433-X
DOI :
10.1109/APMC.2005.1607087
