![](http://datasheet.mmic.net.cn/200000/MA87937_datasheet_15081611/MA87937_1.png)
M/A-COM, Inc.
North America:
Tel. (800) 366-2266
s
Asia/Pacic: Tel. +81 (03) 3226-1671
s
Europe: Tel. +44 (1344) 869 595
Fax (800) 618-8883
Fax +81 (03) 3226-1451
Fax +44 (1344) 300 020
1
Specications Subject to Change Without Notice.
V3.00
Varactor Controlled Oscillator
21.15 - 23.63 GHz
MA87937
Parameter
Symbol
Units
Specication
Frequency Range1
F
GHz
21.15 to 23.63
Power Output2
P
OUT
mW
10 Min.
Electronic Tuning Ranges
F/V
MHz
400 Min., 600 Max.
Modulation Sensitivity
MOD/SENS
MHz/V
30 Min., 75 Max.
Voltage Operating Range (Gunn)3
V
OP/GUNN
VDC
+4.0 to +8.0
Operating Current (Gunn)
I
OP
mA
550 Max.
Startup Current (Gunn)
I
TH
mA
625 Max.
Voltage Operating Range (Tuning)
V
OP/TUNING
VDC
+1.0 to +13.0
Change Frequency vs. Temperature
F/T
MHz
See Note 5
Recommended Output Load Parameter
LOAD (SWR)
SWR
Assembly Includes Isolator
Operating Temperature Range (Ambient)4
T
OP
°C
-30 to +70
Waveguide Size/Flange
SMA-Female or WR-42, UG-595/U
Specications @ 25°C
Features
Broadband Electronic Tuning Allows for Center
Frequency Setting to Done Electronically, Alleviating
the Need for “On Site” Mechanical Adjustments.
Excellent Tuning Linearity/Modulation Sensitivity
Small and Lightweight
Modulation and External AFC Control can be
Commonly Applied to Electronic Tuning Bias
Integrated Isolator Increases the Oscillator’s Tolerance
to Load Mismatch
Suitable for Digital or Analog Microwave Radio
Applications
Description
An electrically tunable Gunn oscillator designed to
generate RF power in the range of 21.2 to 23.6 GHz. A
Gunn diode and GaAs hyperabrupt varactor diode are
coupled in a single high Q cavity to provide low AM/FM
noise, excellent frequency and power stability with
respect to changes in operating temperature. This VCO
is suitable for both a transmitting source, or the local
oscillator in a receiver assembly in point-to-point
microwave radio systems.
1. Available in 400 MHz electronically tuned bands.
2. Other output power levels are available, consult factory.
3. Specic voltage assigned by factory. Power supply should be held to ±0.10 V.
4. The ambient temperature is dened as air temperature.
5. The frequency band end points per note 1 will be tunable within the tuning voltage range of +1.0 to +13.0 VDC, with sufcient margin to compensate for
the effects of temperature, load, mismatch and aging.
6. A capacitor is supplied between the Gunn bias pin and ground to suppress bias line oscillations.
7. Tuning bias input is SMA-female, solder pin is available, consult factory.
0.670
MOLEX 22-01-3027
6-32 UNC-2B X 0.100 DP.
1 PLCS.
6-32 UNC-2B X 0.16
DP., 3 PLCS.
0.335
0.29
SMA-FEMALE
ELECTRONIC TUNING
0.100 0.640
0.320
0.24
1.61
0.18
0.46
0.38
MECHANICAL TUNER
0.65
2.18 MAX.
1.92
SMA-FEMALE
RF OUT
0.38
1.26
Di
i
i i
h
0 015
q
Dimensions are in inches: .xxx = ±0.015
.xxx = ±0.005
Dimensions in ( ) are in mm.
Wire harness is 8 inches nominal
VCC (RED)
GRD (BLACK)