A Miniaturize Bandpass Filter with Harmonic Suppression Using Meandered Quarter-Wavelength Resonators

Table 2

Comparison with some previously published designs.

	IL @ 𝑓0	3 dB FBW	Harmonic suppression*	Size (𝜆𝑔^2)
[26]	2.0 dB	26.5%	3.9𝑓0	0.189∗0.438
[27]	3.3 dB	12.5%	>3.75𝑓0	0.166∗0.141
[28]	1.93 dB	4%	—	0.175∗0.175
[29]	2.1 dB	5.1%	>2𝑓0	1.03∗0.171
[30]	1.2 dB	13.2%	>2𝑓0	0.21∗0.15
[31]	0.78 dB	15.8%	4𝑓0	0.23∗0.17
[32]	2.2 dB	6.0%	2.5𝑓0	0.557∗0.124
This work	1.3 dB	10.6%	4.2𝑓0	0.052∗0.071

∗20 dB rejection bandwidth.