EECTECH Microwave provides a series of rectangular waveguide attenuators. Typical attenuation values are 3dB, 6dB, 10dB, 20dB and 30dB (other attenuation values can be provided, please consult us for details).

The assembly structure includes an accurate element to achieve optimal electrical performance, but note that the relationship between attenuation and frequency may vary considerably depending on the attenuation at a given frequency.

Waveguide Fixed Attenuators can also provide ordinary and high power units. For more information, please feel free to contact us and discuss your needs with us.

Waveguide Fixed Attenuator

MODEL NO	FREQ RANGE	VSWR	AVG POWER	ATTE.***	WG TYPE (IEC/EIA)	FLANGE TYPE	MATERIAL
	(GHz)	Max	(W)	(dB)
EHD-14WFA10PPA	1.13-1.73	1.2	2	3/6/10/20/30	R14/WR650	FDP/FDM	Al
EHD-18WFA10PPA	1.45-2.20	1.2	2	3/6/10/20/30	R18/WR510	FDP/FDM	Al
EHD-22WFA10PPA	1.72-2.61	1.2	2	3/6/10/20/30	R22/WR430	FDP/FDM	Al/Cu
EHD-26WFA10PPA	2.17-3.30	1.2	2	3/6/10/20/30	R26/WR340	FDP/FDM	Al/Cu
EHD-32WFA10PPA	2.60-3.95	1.15	2	3/6/10/20/30	R32/WR284	FDP/FDM	Al/Cu
EHD-40WFA10PPA	3.22-4.90	1.15	2	3/6/10/20/30	R40/WR229	FDP/FDM	Al/Cu
EHD-48WFA10PPA	3.94-5.99	1.15	2	3/6/10/20/30	R48/WR187	FDP/FDM	Al/Cu
EHD-58WFA10PPA	4.64-7.05	1.15	2	3/6/10/20/30	R58/WR159	FDP/FDM	Al/Cu
EHD-70WFA10PPA	5.38-8.17	1.15	2	3/6/10/20/30	R70/WR137	FDP/FDM	Al/Cu
EHD-84WFA10PPA	6.57-9.99	1.15	2	3/6/10/20/30	R84/WR112	FBP/FBM/FB	Al/Cu
EHD-100WFA10PPA	8.20-12.50	1.15	2	3/6/10/20/30	R100/WR90	FBP/FBM/FB	Al/Cu
EHD-120WFA10PPA	9.84-15.0	1.15	2	3/6/10/20/30	R120/WR75	FBP/FBM/FB	Al/Cu
EHD-140WFA10PPA	11.9-18.0	1.15	2	3/6/10/20/30	R140/WR62	FBP/FBM/FB	Al/Cu
EHD-180WFA10PPA	14.5-22.0	1.15	2	3/6/10/20/30	R180/WR51	FBP/FBM/FB	Al/Cu
EHD-220WFA10PPA	17.6-26.7	1.2	2	3/6/10/20/30	R220/WR42	FBP/FBM/FB	Al/Cu
EHD-260WFA10PPA	21.7-33.0	1.2	2	3/6/10/20/30	R260/WR34	FBP/FBM/FB	Al/Cu
EHD-320WFA10PPA	26.3-40.0	1.2	2	3/6/10/20/30	R320/WR28	FBP/FBM/FB	Al/Cu

Waveguide High Power Fixed Attenuator

MODEL NO	FREQ RANGE	VSWR	AVG POWER	ATTE.***	WG TYPE (IEC/EIA)	FLANGE   TYPE	MATERIAL
	(GHz)	Max	(W)	(dB)
EHD-48WHPFA20PPC50	5.4-5.9	1.25	50	20	R48/WR187	FDP/FDM	Al/Cu
EHD-70WHPFA55PPC500	5.85-7.025	1.2	500	55	R70/WR137	FDP/FDM	Al/Cu
EHD-100WHPFA10PPC250	8.5-9.6	1.1	250	10	R100/WR90	FBP/FBM/FBE	Al/Cu
EHD-120WHPFA30PPC50	9.84-15.0	1.15	50	10/20/30	R120/WR75	FBP/FBM/FBE	Al/Cu
EHD-140WHPFA40PPC100	14.5-15.5	1.25	100	40	R140/WR62	FBP/FBM/FBE	Al/Cu
EHD-320WHPFA10PPC20	26.3-40.0	1.25	20	10	R320/WR28	FBP/FBM/FBE	Al/Cu

Waveguide Variable Attenuator

Model No*	Freq Range (GHz)	VSWR (Max)	Attenuation** (dB)	WG Type		Flange	Material
				IEC	EIA
EHD-12WVA30...	0.96-1.46	1.25	0~30	BJ12	WR770	FDP/FDM	Al
EHD-14WVA30...	1.13-1.73	1.25	0~30	BJ14	WR650	FDP/FDM	Al
EHD-18WVA30...	1.45-2.20	1.25	0~30	BJ18	WR510	FDP/FDM	Al/Cu
EHD-22WVA30...	1.72-2.61	1.25	0~30	BJ22	WR430	FDP/FDM	Al/Cu
EHD-26WVA30...	2.17-3.30	1.25	0~30	BJ26	WR340	FDP/FDM	Al/Cu
EHD-32WVA30...	2.60-3.95	1.25	0~30	BJ32	WR284	FDP/FDM	Al/Cu
EHD-40WVA30...	3.22-4.90	1.25	0~30	BJ40	WR229	FDP/FDM	Al/Cu
EHD-48WVA30...	3.94-5.99	1.25	0~30	BJ48	WR187	FDP/FDM	Al/Cu
EHD-58WVA30...	4.64-7.05	1.25	0~30	BJ58	WR159	FDP/FDM	Al/Cu
EHD-70WVA30...	5.38-8.17	1.25	0~30	BJ70	WR137	FDP/FDM	Al/Cu
EHD-84WVA30...	6.57-9.99	1.25	0~30	BJ84	WR112	FBP/FBM/FBE	Al/Cu
EHD-100WVA30...	8.20-12.40	1.25	0~30	BJ100	WR90	FBP/FBM/FBE	Al/Cu
EHD-120WVA30...	9.84-15.0	1.25	0~30	BJ120	WR75	FBP/FBM/FBE	Al/Cu
EHD-140WVA30...	11.9-18.0	1.25	0~30	BJ140	WR62	FBP/FBM/FBE	Al/Cu
EHD-180WVA30...	14.5-22.0	1.25	0~30	BJ180	WR51	FBP/FBM/FBE	Al/Cu
EHD-220WVA30...	17.6-26.7	1.30	0~30	BJ220	WR42	FBP/FBM/FBE	Al/Cu
EHD-260WVA30...	21.7-33.0	1.30	0~30	BJ260	WR34	FBP/FBM/FBE	Al/Cu
EHD-320WVA30...	26.5-40.0	1.30	0~30	BJ320	WR28	FBP/FBM/FBE	Al/Cu
EHD-400WVA30...	32.9-50.1	1.30	0~30	BJ400	WR22	FUGP	Cu
EHD-500WVA30...	39.2-59.6	1.30	0~30	BJ500	WR19	FUGP	Cu
EHD-620WVA30...	49.8-75.8	1.30	0~30	BJ620	WR15	FUGP	Cu
EHD-740WVA30...	60.5-91.9	1.30	0~30	BJ740	WR12	FUGP	Cu
EHD-900WVA30...	73.8-112	1.30	0~30	BJ900	WR10	FUGP	Cu

Notes: 1. * The above standard models are the most common parts for ordering sizes, materials and flanges. However, you can easily change these models to meet your needs by using the model code system with order information to obtain the complete part number.

2. ** For more information about flange type/connector, please contact us for your specific requirements.

3. *** Nominal attenuation accuracy: +0.5dB, frequency sensitivity: +0.7dB.   Customers must select the appropriate attenuation values (3dB, 6dB, 10dB, 20dB, 30dB, 40dB, 50dB, 60dB, 70dB) for application and insert them into the component numbers listed in the attenuation values.