Performance of 2–3.6 GHz Five-Port/Three-Phase Demodulators with Baseband Analog Regeneration Circuit in Direct-Conversion Receivers

Table 1

Conversion gain (CG), noise figure (NF), and theoretical and measured minimum detectable signal (MDS) for FPD, TPD, and IQD architectures @𝑓=2.8 GHz for BER=10⁻³ (1 Msps 0.35 SQRRC-filtered QPSK modulated RF signal with AWGN).

	CG (dB)	NF (dB)	MDS theoretical (dBm)	MDS measurement (dBm)
Power Detector + Combiner	−11	32	—	—
Mixer	10	12	—	—
FPD	−15	34	−63	−50
TPD	12	17	−80	−74
IQD	8	14.6	−82.6	−76.5