Merrimac CSD-20N-0.75G Directional coupler Datasheet

CSD-20N-0.75G
DIRECTIONAL COUPLER
REV: 001, 03/29/07
TECHNICAL DESCRIPTION
FEATURES
• 0.5 - 1.0 GHz
• LOW LOSS
• HIGH DIRECTIVITY
• EXCELLENT COUPLING ACCURACY
• SURFACE MOUNT
The Multi-Mix® CSD-20N-0.75G provides a 20 dB coupling with low insertion loss, low VSWR, and high
directivity. Accurate coupling factors make this series ideal for use in power amplifiers and RF signal distribution and processing equipment.
CSD-20 directional couplers are fusion bonded multilayer stripline devices. The fusion bonding process
yields a homogeneous monolithic dielectric structure with reliability, ruggedness, and electrical performance that is superior to conventional adhesive bonding techniques.
GENERAL SPECIFICATIONS
MEAN
COUPLING
VSWR
(MAX, ALL PORTS)
20 ± 1.0
1.22:1
FREQUENCY RANGE
MHz
INSERTION LOSS
(dB MAX)
500 - 1000
0.2
FREQUENCY SNESITIVITY
(dB MAX)
DIRECTIVITY
(dB MIN)
POWER
(AVG. CW WATTS)
± 1.0
16
100
OPERATING
TEMPERATURE
-55° - +85° C
PACKAGE OUTLINE / TAPE AND REEL ORIENTATION
DIRECTION OF FEED
P0
.650
.402
PORT 2
PAD 1
P
0
PORT 1
"A"
1
"A"
B0
W
2
.192
3
.061
.480
K
1
PORT 3
MARKED SIDE UP
PORT 4
A0
SECTION "A"-"A"
W
P1
P0
A0
B0
K0
ENGLISH (in) 0.9449 0.6299 0.1575 0.5126 0.6665 0.09448
METRIC (mm) 24.00
16.00 4.00
13.02
16.93
2.4
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: 1.888.434.MMFM / Fax: 973.882.5990 / Email: [email protected] / www.merrimacind.com
Insertion Loss
Coupling
-18
1
-18.5
0.75
Insertion Loss(dB)
Coupling (dB)
-19
-19.5
-20
-20.5
-21
-22
500
0.5
0.25
0
-0.25
-0.5
-0.75
-21.5
550
600
650
700
750
800
850
900
950
-1
500
1000
550
600
650
700
Frequency (MHz)
Port 2
800
850
900
950
1000
850
900
950
1000
Directivity
Port 3
0
Port 4
1.4
-5
1.35
Directivity (dB)
-10
1.3
1.25
1.2
1.15
-15
-20
-25
-30
1.1
-35
1.05
1
500
750
Frequency (MHz)
VSWR
Port 1
VSWR
CSD-20N-0.75G
TYPICAL PERFORMANCE
550
600
650
700
750
800
Frequency (MHz)
850
900
950
-40
500
1000
550
600
650
700
750
800
Frequency (MHz)
MOUNTING CONFIGURATION
50 ohm line .030 delectric
thickness ER=
.537
.034
.453
.380
.063
.050
.068
Ground plane of unit
should be soldered to
ground plane of circuit
board for optimum
performance
Ground plane
TRUTH TABLE
1
2
3
4
1
Input
Output
Isolated
Coupled
2
Output
Input
Coupled
Isolated
3
Isolated
Coupled
Input
Output
4
Coupled
Isolated
Output
Input
Merrimac Industries / 41 Fairfield Place, West Caldwell, NJ 07006
Tel: 1.888.434.MMFM / Fax: 973.882.5990 / Email: [email protected] / www.merrimacind.com
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