The miniaturized waveguide isolator is made up of the major parts as metal cavity, magnetic spin, permanent magnet substrate and so on. The general material of the metal cavity is aluminum alloy or copper alloy, the aluminum is surface treated by conductive oxidation or silver plating. Magnetic spin, permanent magnet substrates are sticked to the surface of the cavity.
-------Avoid strong magnetic field or ferromagnetic materials.
     The miniaturized waveguide isolator is widely used in microwave transmission systems. The functions are as following: improving matching, eliminating the level back reflection, protecting the level before. The application advantages are obviously appeared in band above Ka, especially the insertion loss is 1/3 to other circulators (the ratio of the energy).

	Type	Waveguide	Frequency(GHz)	Band width	Loss(dB)	Isolation(dB)	VSWR	Average power(W)	Shape number
1	WM-104-IS	BJ 100	10.0-10.8	Full	0.30	18	1.35	5	1
2	WM-120-IS	BJ 120	11.7-12.2	Full	0.35	18	1.30	5	2
3	WM-125-IS	BJ 120	12.2-12.7	Full	0.35	18	1.30	5	2
4	WM-130-IS-1	BJ 120	12.7-13.2	Full	0.35	18	1.30	5	2
5	WM-130-IS-2	BJ 140	12.7-13.2	Full	0.35	20	1.20	5	3
6	WM-150-IS	BJ 140	14.3-15.5	Full	0.35	20	1.20	5	3
7	WM-187-IS	BJ 220	17.7-19.7	Full	0.40	18	1.35	2	4
8	WM-224-IS	BJ 220	21.2-23.6	Full	0.40	18	1.35	2	4
9	WM-255-IS	BJ 220	24.5-26.5	Full	0.40	18	1.35	2	4
10	WM-282-IS	BJ 320	27-29.5	Full	0.40	18	1.35	2	5
11	WM-302-IS	BJ 320	29-31.4	Full	0.40	18	1.35	2	5
12	WM-343-IS	BJ 320	33-35.5	Full	0.40	18	1.35	2	5
13	WM-363-IS	BJ 320	35-37.5	Full	0.40	18	1.35	2	5
14	WM-322-IS	BJ 320	31-33.4	Full	0.40	18	1.35	2	5
15	WM-385-IS	BJ 320	37-40	Full	0.40	18	1.35	2	5

Shape number	Dimension(mm)			Flange
	A	B	C
1	12.7	50.8	41.4	FBP100
2	12.7	38.3	38.0	FBP120
3	12.7	38.3	33.3	FBP140
4	9.53	31.75	22.4	FBP220
5	9.53	31.75	19.1	FBP320