Compact and Broadband-Balanced Amplifier for a Monolithic Microwave Integrated Circuit Using Lumped Elements Only

Table 1

Comparison between the proposed QPD and previous works.

References	Frequency (GHz)	Relative bandwidth (%)	Phase error (deg)	Magnitude imbalance (dB)	Size ()
[16]	1.1–3.5	104	±5	<0.9	0.44
[19]	3–8	90.9	±5	—	1.5
[20]	0.71–2.74	117.7	±4.5	<0.5	0.17
[21]	2.3–5.48	81.7	±10	<1.5	0.05
[22]	3.1–11.1	112.7	±5	<0.3	0.08
[23]	3.8–8	71.1	±3	<1	0.34
This work	1.19–2.96	85.3	±8.7	<0.32	0.036