Title :
Design, analysis and simulation of hybrid integrated NRD guide based QPSK modulator for LMDS applications at 28GHz
Author :
Bhagat, Santosh Kumar ; Yadav, Amar Nath ; Sharma, Vivek ; Pathak, Nagendra P.
Author_Institution :
Radio Frequency Integrated Circuits (RFIC) Group, Department of Electronics and Computer Engineering (E&CE), Indian Institute of Technology (IIT) - Roorkee, Uttarakhand, India
Abstract :
This paper reports design, analysis and simulation of QPSK modulator in Ka-band. The modulator is designed at 28GHz frequency in hybrid microwave integrated circuit (HMIC) technology. For feasible high frequency operation, the design is integrated with non-radiative dielectric (NRD) guide using NRD guide to Microstrip line transition. In simulation, the observed value of the maximum phase deviation from the quadrature phase shift is 5°. Error vector magnitude (EVM) of the designed modulator is determined to be 11.9% for 400 Mbps digital data rate, modulated over 28 GHz RF carrier. The effect of amplitude and phase variations is analyzed through a constellation diagram, power spectrum and eye pattern.
Keywords :
Frequency modulation; Microwave circuits; Phase shift keying; Radio frequency; Switches; Ka band; NRD guide; QPSK; modulator; switch;
Conference_Titel :
Communications (NCC), 2013 National Conference on
Conference_Location :
New Delhi, India
Print_ISBN :
978-1-4673-5950-4
Electronic_ISBN :
978-1-4673-5951-1
DOI :
10.1109/NCC.2013.6487968
