Ka-band direct transmitter modules for baseband pre-compensation

Author

Drolet, D. ; Panther, A. ; Verver, C.J. ; Kautio, K. ; Lai, Y.L.

Author_Institution

Commun. Res. Centre Canada, Ottawa, Que., Canada

Volume

1

fYear

2005

fDate

4-6 Oct. 2005

Abstract

This paper presents two different RF modules for implementation in a Ka-band direct transmitter architecture with feedback for baseband I/Q pre-compensation. The first module is realized using conventional MIC technology, and combines a direct Ka-band SSB modulator, a driver amplifier, a microstrip directional coupler, and a detector circuit in the feedback loop. A maximum conversion gain of +9.6dB is measured at 29GHz. The second module was fabricated using LTCC technology to provide similar functionality in a more compact package. Measured conversion gain for this unit reaches a maximum of +6.1dB at 29GHz. With pre-compensation, suppression levels of at least 40dB for the carrier, and 30dB for the image sideband, have been achieved for both modules.

Keywords

amplifiers; detector circuits; microstrip directional couplers; modulators; modules; transmitters; 29 GHz; 6.1 dB; 9.6 dB; Ka-band direct transmitter modules; LTCC technology; MIC technology; SSB modulator; baseband pre compensation; detector circuit; driver amplifier; feedback loop; microstrip directional coupler; Amplitude modulation; Baseband; Driver circuits; Feedback; Gain measurement; Microstrip; Microwave integrated circuits; Radio frequency; Radiofrequency amplifiers; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2005 European

Print_ISBN

2-9600551-2-8

Type

conf

DOI

10.1109/EUMC.2005.1608946

Filename

1608946