Study of Wideband Microstrip Correlator for Ultra-Wideband Communication Systems

Design and implementation of a UWB six‐port correlator for 6–9 GHz frequency band

“…The phase difference between output ports of the power divider should be zero degree ideally. The Wilkinson power divider is a relatively broad band device that without any modification can operate in the whole desired bandwidth (50% relative bandwidth) [10].…”

“…These circuits are designed by using Agilent's Advanced Design System (ADS). The proposed UWB six‐port correlator has reduced the total covered area as compared with those proposed in pervious papers [2, 10].…”

“…The conventional 90° branch line coupler has a relative bandwidth of only up to 10% [10, 11]. The conventional branch line coupler with its simplest structure has a narrow bandwidth because of small flexibility available in its design parameters, so its bandwidth is limited [12].…”

Ultra-wideband six-port transmitter and receiver pair 3.1–4.8 GHz

“…Here, we present a new ultra-wideband solution of a transmitter and receiver pair based on the sixport principle covering the UWB frequency range 3.1 -4.8 GHz (43% relative bandwidth). The six-port transmitter and receiver pair presented in this paper utilizes our own developed ultra-wideband six-port circuit, also known as correlator, implemented in a standard printed circuit board [5]. The designed ultra-wideband correlator shows good phase and amplitude balances.…”

Calibration and error analysis of a Ka-band fully polarimetric radiometer built with wideband microstrip correlator

“…It use a wideband microstrip correlator [4] to perform analog correlation of the two orthogonal polarization components. For stable and high sensible Stokes parameters measurements, we choose the total power type (figure.1): a 2-channel heterodyne receiver with subharmonic mixers, pumped with a common local oscillator.…”