Broadband Schottky and
Tunnel Diode Detectors
RLC Electronics’ Zero Bias Detectors are designed for use
in coaxial systems in the measurement of relative microwave
power up to 100 mW over the frequency range of 10 MHz
to 18.0 GHz. The design assures flat frequency response
combined with high sensitivity. Options available include nega-
tive output polarity, positive output polarity, matched pairs, and
Square Law response.
Schottky Diode Specifications
Model No.
Frequency Range: (MHz)
Frequency Response: *
CR–133
10 – 12,400
±0.2 dB/octave to 8 GHz
±0.5 dB/full range
Sensitivity: (Typ.) High
Low
Power: (Max.)
Output Impedance
VSWR: 10 MHz to 4.5 GHz
4.5 GHz to 7.0 GHz
7.0 GHz to 12.4 GHz
12.4 GHz to 18 GHz
Polarity:
CR–183
10 – 18,000
±0.2/octave to 8 GHz
±0.5 to 12.4 GHz
±1.0 to 18 GHz
100 mV output at 0.35 mW
0.4 mV output/uW
100 mV (peak or average)
15k ohms max. shunted to 10 pf
1.20 max.
1.35 max.
1.50 max.
1.70 max.
Negative
CR–135
CR–185
CR–134
CR–184
CR–133M
CR–183M
Model No.
Options
Feature
Matched pair of CR–133’s
or CR–183’s
Tracking (Max.):
±0.2 dB to 8 GHz
±0.3 dB from 8 to 12.4 GHz
±0.5 dB from 12.4 to 18 GHz
CR–133 or CR–183
With positive output polarity
CR–133 or CR–183
With Square Law load
±0.5 dB max. variation from
Square Law up to 50 mV
output into 75k min.
Sensitivity (Min.):
0.1 mV DC/uWcw
*Note: Frequency Response measured on Square Law measuring device.
Environment:
MIL–E–5400, Class 1A
Connectors:
Input – ‘SMA’ male; or Type ‘N’ for
CR–133 only. Output – Type ‘BNC’ female
To designate the detector desired use:
(1) 133, 133m, 134, etc. for Model No.
(2) N for type ‘N’, R for ‘SMA’ input connector
Example: CR–133–N is a CR–133 with a ‘N’ mate input connector
Typical Operating Curves
RLC ELECTRONICS, INC.
86
83 Radio Circle, Mount Kisco, New York 10549 • Telephone: 914-241-1334 • Fax: 914-241-1753
e-mail: sales@rlcelectronics.com • www.rlcelectronics.com
Tunnel Diode Specifications
CRT
-1-2
Model
No.
CRT–218
CRT–625
CRT–1425
CRT–1785
Frequency
Range
(GHz)
2 – 18
5.8 – 6.7
13.7 – 14.8
17.3 – 18.4
Frequency
Response
(dB Max.)
±1.0
±.15
±.20
±.25
VSWR
(Max.)
3.5:1
2.0:1
2.0:1
2.0:1
Output
(mV Min.)
1.8
2.0
2.0
2.0
Not Available
Optional
Optional
Optional
100 mW
Negative
DC blocks
Power
(Max.)
Polarity
Note: Specifications are for –20dBm input and 51 ohm video load.
Video Resistance:
80 ohms nominal
Temperature Sensitivity:
.005 dB/°C
Connectors:
Input – ‘SMA’ male
Output – ‘SMA’ female
To designate the detector desired use:
(1) 218, 625, 1425, 1785 for Model No.
(2) ‘I’ for inner DC block
‘IO’ for optional inner & outer DC block
Example: CRT–625–IO is a 5.8–6.7 GHz detector with inner and outer DC blocks
Typical Operating Curves
Outline Drawing
Tolerances unless otherwise specified are .xx ±.02, .xxx ±.005
RLC ELECTRONICS, INC.
83 Radio Circle, Mount Kisco, New York 10549 • Telephone: 914-241-1334 • Fax: 914-241-1753
e-mail: sales@rlcelectronics.com • www.rlcelectronics.com
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