QFL/QFH Series High Pass Filters and Low Pass Filters

Product Description

QuinStar Technology's QFL series high pass filters are available from 18 to 110 GHz in seven waveguide bands. These filters offer low loss and minimum ripple in the pass band and high rejection in the stop band.

The high pass filters consist of precisely machined reduced width waveguide below cutoff sections with input/output impedance transformer sections. High pass filters may be custom-designed to meet your specific requirements.

Specifications

FREQUENCY BAND	K	Ka	Q	U	V	E	W
Frequency Range (GHz)	18-26.5	26.5-40	33-50	40-60	50-75	60-90	75-110
Waveguide Size	WR-42	WR-28	WR-22	WR-19	WR-15	WR-12	WR-10
LOW PASS FILTERS
Typical 3 dB Upper Cutoff Frequency (GHz)	28.5	41.5	52.2	62.3	77.0	93.0	114.0
Rejection Band (GHz)	30-100	48-120	60-145	72-185	90-220	108-270	132-330
Lower Cutoff Frequency (GHz) ¹	14.1	21.1	26.3	31.4	39.9	48.4	59.1
Insertion Loss (dB max)	1.0	1.0	1.0	1.0	1.2	1.5	1.8
Rejection Band for Attenuation >40 dB (GHz)	35-66	50-95	62-120	75-145	92-180	110-215	140-265
HIGH PASS FILTERS
Cutoff Frequency Range (GHz)	14-23	21-35	26-44	31-53	40-65	48-80	59-95
Pass Band Insertion Loss (dB max)	0.8	0.9	1.0	1.0	1.0	1.2	1.2
Pass Band VSWR (min)	1.15:1
VSWR Rejection at 90% of Cutoff Frequency (dB min)²	45	45	40	40	40	35	35
Skirt Selectivity (dB/GHz typ)²	20	15	10	10	8	6	5

Other waveguide sizes are available.
¹The lower cutoff frequency can be modified to meet special application requirements.
² High pass filters are typically custom designed to meet your specific requirements. Typical performance presented here.

FREQUENCY BAND	WAVEGUIDE SIZE	FLANGE PATTERN	DIMENSIONS (inches/mm) ¹
FREQUENCY BAND	WAVEGUIDE SIZE	FLANGE PATTERN	A, B	C
K	WR-42	UG-595/U	0.88/22.4	3.0/76.2
Ka	WR-28	UG-599/U	0.75/19.1	1.65/41.9
Q	WR-22	UG-383/U	1.13/28.7	2.0/50.8
U	WR-19	UG-383/U	1.13/28.7	1.5/38.0
V	WR-15	UG-385/U	0.75/19.1	1.0/25.4
E	WR-12	UG-387/U	0.75/19.1	1.0/25.4
W	WR-10	UG-387/U	0.75/19.1	1.0/25.4

¹ Standard versions.
Please contact QuinStar for High Pass Filter Mechanical Specifications.

Ordering Information

Model Number: QF_ - AB C D 00 (Click here for automatic web quote request form)

Model prefix

	L	=	Low pass
	H	=	High pass

Cutoff frequency rounded to nearest GHz (1A = 100-109 GHz)

Configuration:

	S	=	Standard
	Z	=	Custom

Waveguide band designator:

K	=	K-band
A	=	Ka-band
Q	=	Q-band
U	=	U-band
V	=	V-band
E	=	E-band
W	=	W-band

Also available:
	Bandpass Filters (QFB Series)	Band Reject and Notch Filters (QNF Series)
	Master List of All Products	Catalog Request