CSD-20N-0.45G Datasheet, PDF (1/2 Pages) Merrimac Industries, Inc. – DIRECTIONAL COUPLER

CSD-20N-0.45G
DIRECTIONAL COUPLER
REV: 001, 05/26/05
TECHNICAL DESCRIPTION
FEATURES
• 380 - 520 MHz
• LOW LOSS
• HIGH DIRECTIVITY
• EXCELLENT COUPLING ACCURACY
• SURFACE MOUNT
APPLICATIONS
• LAND MOBILE RADIO (LMR) SYSTEMS
• RADAR COMMUNICATIONS
• CDMA 450 BASE STATION
RF SUBSYSTEMS
• TV TRANSMITTERS
The Multi-Mix^® CSD series provides 20 dB coupling at 450 MHz. The CSD series features accurate cou-
pling factors, low VSWR, and high directivity. Very low insertion loss and high power handling capability
make this series ideal for use in base station power amplifiers particularly in the main loop of the feedfor-
ward amplifiers. The CSD series is also ideal for use in RF sampling networks and control circuitry in
high power transmitters.
CSD directional couplers are based on fusion bonded multilayer stripline structures. The fusion bonding
process yields homogeneous monolithic dielectric structures with reliability, ruggedness, and electrical
and thermal performance that are superior to conventional adhesive bonding techniques.
FREQUENCY RANGE
(MHz)
380 - 520
FREQUENCY SENSITIVITY
(dB MAX)
± 0.30
GENERAL SPECIFICATIONS
INSERTION LOSS
(dB MAX)
MEAN COUPLING
(dB)
0.25
20 ± 1.0
DIRECTIVITY
( dB MIN)
AVERAGE POWER
(WATTS, MAX.)
16
250
VSWR
(MAX, ALL PORTS)
1.15:1
RF
INTERFACE
OPERATING
TEMPERATURE
Leadless Surface Mount
-55° TO +85° C
PACKAGE OUTLINE
PORT 2
.650
.402
PORT 1
1
CSD-20N-0.45G
2
3
PORT 3
PORT 4
THE MULTI-MIX MICROTECHNOLOGY^® GROUP IS ISO 9001:2000 REGISTERED
U.S. Patent 6,099,677 and other Patents Pending.
Merrimac Industries / 41 Fairfield Place, West Caldwell, NJ 07006
Tel: [phone].MMFM / Fax: [phone] / Email: [e-mail] / www.merrimacind.com