Even-harmonic C-band modulator

Author

Di Alessio, Fonte Loredana ; Orazio, Antonella D. ; Lavolpe, Raffaele

Author_Institution

Dipt. di Elettrotecnica ed Elettronica, Politecnico di Bari, Italy

Volume

53

Issue

4

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

1203

Lastpage

1210

Abstract

Direct modulation at microwave frequencies promises the advantages of compact size, low cost, and relatively simple system design. In this paper, a novel architecture of a direct-vector C-band modulator is described. In particular, a subharmonic mixer is used to overcome the high carrier leakage that is associated with conventional fundamental modulators at microwave frequencies. The topology exhibits relative low conversion loss (11 dBc) and good image frequency rejection (23.5 dBc) and local oscillator (LO) rejection (23.9 dBc). The LO power level used by the mixer is approximately 6 dBm for optimal performance in the operating band.

Keywords

microwave devices; modulators; C-band modulator; carrier leakage; direct modulation; harmonic balance; image rejection; microwave frequencies; sideband suppression; subharmonic mixer; system design; Amplitude modulation; Costs; Frequency conversion; Microwave frequencies; Mixers; Phase modulation; Radio frequency; Schottky diodes; Space vector pulse width modulation; Branch-line; harmonic balance (HB); image rejection; modulation; ring-hybrid; sideband suppression;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2005.845683

Filename

1420749