NDLI: Wideband low cost planar mono-pulse comparator circuit

Content Provider	IET Digital Library
Author	Ghaffarian, Mohammad Saeid Honari, Mohammad Mahdi Khajepour, Somayeh Moradi, Gholamreza Shamaiee, Mehran
Abstract	A novel wideband planar single layer mono-pulse comparator for the application of mono-pulse angle of arrival and target detecting is presented. This low cost comparator consists of three new broadband differential phase shifters and four 3 dB hybrid commercial couplers to generate sum and delta (difference) output channel frequency response. The operating frequency ranges in S band over one octave from 2 to 4 GHz. The comparator circuit is designed and fabricated on single layer RO4003C microstrip board with the simple and low cost PCB process. The amplitude imbalance and phase shift ripple between the four input channels and two sum and delta output channels are <1 dB and 2.5°, respectively. By integrating a four-arm spiral antenna and the proposed comparator, a mono-pulse antenna is designed and fabricated. In the frequency range from 2 to 4 GHz, the sidelobe level is ≤17 dB, the sum gain is measured as >3 dBic, and the null depth is better than 25 dB. The obtained sum and difference radiation characteristics make the proposed mono-pulse antenna promising for target detecting and tracking in the two dimension applications.
Starting Page	1726
Ending Page	1733
Page Count	8
ISSN	17518725
Volume Number	11
e-ISSN	17518733
Issue Number	Issue 12, Sep (2017)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/11/12
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2016.0927
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2017-06-15
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Amplitude Imbalance Analogue Circuit Antenna Radiation Pattern Broadband Differential Phase Shifter Comparators (circuits) Coupled Circuit Direction of Arrival Estimation Four-arm Spiral Antenna Frequency 2 GHz to 4 GHz Gain 3 DB Hybrid Commercial Coupler Microwave Antenna Microwave Circuit And Device Microwave Phase Shifters Monopulse Angle of Arrival Application Monopulse Antenna Object Detection Output Channel Frequency Response PCB Process Phase Shift Ripple Printed Circuit Radiation Characteristic S Band Single Antenna Single Layer RO4003C Microstrip Board Spiral Antenna Sum And Delta Generation Target Detection UHF Antenna UHF Phase Shifters Wideband Low Cost Planar Monopulse Comparator Circuit Wideband Planar Single Layer Monopulse Comparator
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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