Broadband microwave mixer mounted on suspended line baluns

Author

Palamutcuoglu, O. ; Kurhan, I.

Author_Institution

Fac. of Electr.-Electron. Eng., Istanbul Tech. Univ., Turkey

fYear

1994

fDate

12-14 Apr 1994

Firstpage

500

Abstract

The performance of a microwave balanced mixer which is mounted on the suspended microstrip baluns is investigated. The mixer is in the conventional double-balanced ring form and the two ports (RF and IF) are terminated by the same real impedance (50 ohms). The pump power requirements for to provide matching at either ports is investigated and the conversion losses are calculated. A new type of balun is proposed for RF port termination which is consist of a normal microstrip and a phase inverting suspended microstrip line. It is shown that this balun theoretically has infinite bandwidth when the odd-order characteristic impedance of the suspended line Y_oo=2Y₀. The mid frequency of operation is selected as 10 GHz and the bandwidth of about 2 octave (3-12 GHz) with less than 8 dB loss (6 dB measured at 9 GHz)

Keywords

baluns; microstrip components; microwave mixers; 3 to 12 GHz; 50 ohm; 6 dB; IF port; RF port; RF port termination; broadband microwave mixer; conversion losses; double-balanced ring; impedance; infinite bandwidth; matching; microstrip; odd-order characteristic impedance; performance; phase inverting suspended microstrip line; pump power requirements; suspended line baluns; Bandwidth; Communication industry; Diodes; Equations; Equivalent circuits; Frequency measurement; Impedance matching; Loss measurement; Microstrip; Radio frequency;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrotechnical Conference, 1994. Proceedings., 7th Mediterranean

Conference_Location

Antalya

Print_ISBN

0-7803-1772-6

Type

conf

DOI

10.1109/MELCON.1994.381047

Filename

381047