QSS / QSD / QSn Series PIN Switches

Characteristics

Single, Double and Multi-Throw Versions

Broad RF Bandwidth

Low Insertion Loss

High Speed Switching Option

Product Description

QuinStar Technology's QSS, QSD and QSn series millimeter-wave broadband PIN switches cover the frequency range of 18 to 110 GHz in seven waveguide bands. These waveguide switches are constructed with a rugged, splitblock mechanical design that utilizes PIN diodes. Most standard switches operate over a full waveguide band, and all can be optimized over a specific narrower frequency range for better isolation or lower insertion loss.

They are ideal for signal attenuation, on/off switching such as receiver protection, and variable pulse width control. The switches can handle RF power levels of up to +27 dBm and optional integral drivers that accept a TTL input as the control signal are available.

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
Bandwidth (GHz min)		Full	Full	Full	Full	10	10	10
Insertion Loss (dB max)	QSS	1.5	1.5	1.5	1.8	2.0	2.5	2.5
	QSD	2.0	2.0	2.0	2.3	2.5	2.8	2.8
	QSn	> 2 throws / Consult Factory
Isolation (dB min)	QSS	30	30	26	26	25	20	20
	QSD	23	23	23	23	20	20	20
	QSn	> 2 throws / Consult Factory
DC Bias Input ¹	Low Loss (Reverse)	+5v, -5v
DC Bias Input ¹	Isolation (Forward)	35 mA Typ.
Switching Speed (nS typ)		350^²	350^²	350^²	350^²	350^²	350^²	350^²
VSWR (typ)		2:1	2:1	2:1	2:1	2:1	2:1	2:1
Power Handling		27 dBm Max.

¹ For ON-state (low insertion loss), the switch requires a reverse voltage of 10 Volts; for OFF-state (isolation), a forward bias current of up to 25 mA is needed. For integral driver option, bias voltage supplies of +5 V and -5 V are required. The switch is controlled by TTL signals.

² Faster switching speed options (< 10 nS) are available for SPDT models, K & Ka bands only.

SPST Version
(round flange pattern shown)

SPDT Version
(round flange pattern shown)

PIN Switch Driver

SPDT Switch with Driver
(V-band model shown)

FREQUENCY BAND	WAVEGUIDE SIZE	FLANGE PATTERN	BIAS INPUT	OUTLINE DIMENSIONS, inches/mm
FREQUENCY BAND	WAVEGUIDE SIZE	FLANGE PATTERN	BIAS INPUT	A	B	C	D	E	F
K	WR-42	UG595/U	SMA Jack	0.88/22.4	0.88/22.4	1.50/38.1	0.88/2.4	0.94/23.9	1.5/38.1
Ka	WR-28	UG599/U	SMA Jack	0.75/19.1	0.75/19.1	1.50/38.1	0.75/19.1	0.88/22.4	1.00/25.4
Q	WR-22	UG383/U	SMA Jack	1.13/28.7	1.13/28.7	1.00/25.4	1.13/28.7	1.31/33.3	1.50/38.1
U	WR-19	UG383/U	SMA Jack	1.13/28.7	1.13/28.7	1.00/25.4	1.13/28.7	1.31/33.3	1.50/38.1
V	WR-15	UG385/U	SMA Jack	0.75/19.1	0.75/19.1	0.75/19.1	0.75/19.1	0.88/22.4	1.00/25.4
E	WR-12	UG387/U	SMA Jack	0.75/19.1	0.75/19.1	0.75/19.1	0.75/19.1	0.88/22.4	1.00/25.4
W	WR-10	UG387/U	SMA Jack	0.75/19.1	0.75/19.1	0.75/19.1	0.75/19.1	0.88/22.4	1.00/25.4

Consult factory for dimensions on switches with greater than 2 throws.

Ordering Information

Model Number: QS_ - AB CD E F (Click here for automatic web quote request form)

(Please specify exact frequency range when ordering.)

QS_

Model prefix:

QSS	=	SPST
QSD	=	SPDT
QSn	=	Number of throws ("3" to "9")

Center frequency rounded to nearest GHz
(1A = 100-109 GHz, FB = fullband)

isolation in dB

Waveguide band designator:

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

Options:

0	=	None
H	=	High speed
Z	=	Custom
D	=	TTL driver
G	=	TTL driver and high speed

Also available:
	Variable PIN Attenuators (QSA Series)	PIN Switches (QSS/QSD/QSn Series)
	Fullband Junction Circulators and Isolators (QJE/QJF Series)	Coax PIN Switches (QSC Series)
	Fullband Isolators and Modulators (QIF/QIM Series)	Manual Waveguide Switches (QWM Series)
	Broadband Cryogenic Circulators and Isolators (QCY/QCI Series)	Electromechanical Waveguide Switches (QWZ Series)
	Micrometer Type Level Set Attenuators and Variable Phase Shifters, Fixed Attenuators (QAF/QAL/QAS Series)	Motorized Programmable Attenuators (QPA Series)
	Dial Type Level Set Attenuators and Variable Phase Shifters (QDA/QDP Series)	Motorized Programmable Phase Shifter (QMP Series)
	Direct Reading Attenuators and Phase Shifters (QAD/QPS Series)
	Master List of All Products	Catalog Request