Miniaturized Multiband Bandpass Filters Based on a Single Multimode Resonator Loading Branches

Table 1

Comparison with some previous multi-band BPFs.

Ref.	Frequency (GHz)	Insertion loss (dB)	Isolation (dB)	Size (λg×λg)
[5]	1.48/2.49/3.47/4.49/5.78	1.49/1.78/0.89/1.18/2.47	ISO12>34.77	0.24×0.17 (0.0408)
			ISO23>27.91
			ISO34>32.98
			ISO45>30.88
[6]	0.59/0.88/1.17/1.48/1.79	2.79/2.88/2.87/2.58/2.27	ISO12>27.89	0.51×0.05 (0.0255)
			ISO23>29.97
			ISO34>35.78
			ISO45>26.90
[7]	0.88/1.19/1.37/1.66/1.97/2.39	2.28/1.99/2.27/2.68/2.19/1.97	ISO12>37.98	0.26×0.15 (0.039)
			ISO23>19.87
			ISO34>29.80
			ISO45>21.92
			ISO56>14.85
[8]	0.69/1.98/3.18/4.49/5.77/6.95	1.29/0.58/0.79/1.06/1.37/2.16	ISO12>52.83	0.16×0.09 (0.0144)
			ISO23>44.95
			ISO34>51.72
			ISO45>41.92
			ISO56>37.88
This work	1.23/1.76/2.38/4.24/5.23/6.75	1.52/1.61/1.43/0.79/0.68/0.87	ISO12>70.00	0.08×0.07 (0.0056)
			ISO23>70.00
			ISO34>70.00
			ISO45>70.00
			ISO56>70.00