Carrier Frequency Independent RF Photonic QPSK Modulator

Author

Sarkhosh, Niusha ; Emami, Hossein ; Ashourian, Mohsen

Author_Institution

Dept. of Electr. Eng., Univ. of California at Los Angeles, Los Angeles, CA, USA

Volume

62

Issue

2

fYear

2014

fDate

Feb. 2014

Firstpage

373

Lastpage

379

Abstract

An RF photonic quadrature phase-shift keying (QPSK) modulator is conceived and demonstrated practically. The modulator has the ability to operate with any RF carrier frequency within an ultra-broad frequency range. This is achieved via utilization of a broadband Hilbert transformer. The transformer enables wideband 90 ^° phase shifts required for QPSK to be realized. The carrier frequency independent operation of this modulator makes it a perfect candidate for many applications such as electronic warfare transmitters operating based on frequency hopping. An operational frequency range of 9.8-30.2 GHz was achieved.

Keywords

electro-optical modulation; electronic warfare; microwave photonics; quadrature phase shift keying; RF photonic QPSK modulator; broadband Hilbert transformer; carrier frequency independent operation; electronic warfare transmitters; frequency 9.8 GHz to 30.2 GHz; frequency hopping; quadrature phase-shift keying; Bandwidth; Frequency modulation; Frequency response; OFDM; Phase shift keying; Radio frequency; Microwave optical design; microwave photonics (MWP); optical fibers; photonics; ultra-wideband (UWB) communications;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2013.2294593

Filename

6689356