HP DRT1-3823, DRT1-3813, DRT1-2321, DRT1-2312, DRT1-2311 Datasheet
Digital Radio Transmitter Modules
for 37 to 40␣ GHz
Technical Data
DRT1-38XX
Features
• Integrated Microwave/
Millimeter-Wave Modules
• Low Phase Noise
• Silicon Bipolar VCO
• Full Band Tuning
• GaAs MMIC Output Stage
• Sample Output for Phase
Locking
• Excellent Tuning Linearity
• 30 dB Attenuator
• Waveguide/RF Output
• Detected Output
Block Diagrams
Transmitter Module Without Attenuator
Modulation Input
Tuning
Voltage
LO X4
Signal
+16
Sample
Output
Transmitter Module With Attenuator
Modulation Input
Tuning
Voltage
LO X4
Signal
+16
Sample
Output
BPF MMIC
BPF MMIC
Description
This digital radio transmitter
module is designed for medium
data rate point to point communication systems operating at
38␣ GHz. This module offers
excellent phase noise performance and can be easily phase
locked to a frequency reference.
The transmitter module provides
+19 dBm of output power, ideal
for use in radios using 2 and 4
level FSK modulation. The module
features an ultra low noise silicon
bipolar VCO operating in the S/C
band. A portion of the oscillator
output is coupled off and is
applied to a frequency divider
network.
BPF
X2AMP AMP
BPF
X2AMP
MMIC
MMIC
AMP
MMIC
AMP
Mute
Mute
Detector
Attenuator
Detector
RF Out 37
to 40 GHz
RF Out 37
to 40 GHz
Attenuator
Control
The low frequency output (less
than 1 GHz) from the frequency
divider can be easily used to
phase lock the source. The main
oscillator output is applied to a
frequency multiplier network to
produce the desired output
frequency in the 37 to 40 GHz
range. The output of this network
is filtered then amplified by a
GaAs MMIC device to produce the
required output power. A detected
sample of the output signal is
provided to facilitate built in test
of key radio components.
Applications
This digital radio module supplies
the transmitter function in radios
operating in the 37 to 40␣ GHz
band. The source provides close
to 100 mW output power over the
temperature range of -30°C to
+70° C. Included within the
transmitter module is a muting
function to reduce output power
by 50 dB for “hot standby” applications. An internal voltage
controlled attenuator function is
optional allowing for 30 dB
dynamic range adjustment.
5965-5089E
8-16
DRT1-38XX Absolute Maximum Ratings (T
Parameters Units Ratings
DC Circuit Power +10 Volts 11
+5.0 Volts +5.5
-5.0 Volts -4.5
Power Control Volts 5
Tuning Voltage Volts 17
= -30 to +70ºC)
A
Notes:
1. Operation in excess of any one of
these parameters may result in
permanent damage.
2. A thermal interface medium must
be used between the bottom of the
package and its mating surface to
ensure optimum heat transfer.
Electrical Characteristics
Part Number
Parameters
RF Tuning Range GHz 37 40 37 40
Operating Temperature Range °C -30 70 -30 70
Storage Temperature Range °C -45 85 -45 85
RF Power Output dBm 18 19 18 19
Sample Out Frequency MHz 289 313 289 313
Sample Out Power dBm -10 0 -10 0
Detected Out V 0.4 2 0.4 2
Harmonics and Sub-Harmonics dBc -30 -30
from 2.65 to 55 GHz from carrier
Spurious Output
from 2.65 - 55 GHz
@ fo ± 1.0 GHz dBc -50 -50
@ prescaler output frequency dBc -30 -30
Phase Noise @ 100 KHz dBc -82 -80 -82 -80
Tuning Voltage V 1 16 1 16
Input Capacitance, Nom pf 27 27
Main Tuning Sensitivity MHz/V 200 400 200 400
Main Tuning Sensitivity Variation 1.5:1 2.0:1 1.5:1 2.0:1
Modulation Bandwidth MHz 20 20
Modulation Sensitivity MHz/V 10 35 10 35
Modulation Sensitivity Variation % 20 20
DC Circuit Power +10 Volts mA 175 175
+5 Volts mA 975 600
-5 Volts mA 50 50
Frequency Pushing on +10V Line MHz/V 40 50 40 50
based on ± 0.2V variation
VSWR @ Full Power Output
Mute Control dBc -50 -50
Mute Control Range V 0 5 0 5
RF Connector WR-28 WR-28
Attenuator Range dB 30 NA
Attenuator Control Voltage V 0 5 NA
RF Output Dynamic Range
Humidity Non Condensing % 85 85
Condensing % 95 95
Case Size inches
Notes:
1. Tested only to 50 GHz
2. Module is unconditionally stable with this load VSWR of 2.0:1
[1]
[2]
[1]
Units Min. Typ. Max. Min. Typ. Max.
d Bc -30 -30
dB 30 Min.
DRT1-3823 DRT1-3813
2.5:1 2.5:1
NA
3.50 x 1.25 x 0.40 3.50 x 1.25 x 0.40
8-17
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