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Broadband Schottky and Tunnel Diode Detectors

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 negative output polarity, positive output polarity, matched pairs, and Square Law response.


Schottly Diode Specifications

Options

Model No.

CR­133

CR­183

Frequency Range: (MHz)

10 ­ 12,400

10 ­ 18,000

Frequency Response: *

±0.2 dB/octave to 8 GHz

±0.5 dB/full range

±0.2dB/octave to 8 GHz

±0.5dB to 12.4 GHz

±1.0dB to 18 GHz

Sensitivity: (Typ.) High

Low

100 mV output at 0.35 mW

0.4 mV output/uW

Power: (Max.)

100 mW (peak or average)

Output Impedance

15k ohms max. shunted to 10 pf

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

1.20 max.

1.35 max.

1.50 max.

1.70 max.

Polarity:

Negative

Model No.

Feature



CR­133M

CR­183M

Matched pair of CR­133’s

or CR­183’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

CR­134

CR­184

CR­133 or CR­183

With positive output polarity



CR­135

CR­185

CR­133 or CR­183

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: MILE5400, Class 1A

Connectors: Input  `SMA’ male; or Type `N’ for  CR133 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’ male input connector




Typical Operating Curves



Tunnel Diode Specifications

CRT–1–2

Model No. 

Frequency Range (GHz)

Frequency Response (dB Max.)

 VSWR (Max.)

 Output (mV Min.)

 DC blocks 

 Power (Max.)

 Polarity 

CRT­218

2 ­ 18

±1.0

3.5:1

1.8

Not Available

100 mW

Negative

CRT­625

5.8 ­ 6.7

±.15

2.0:1

2.0

Optional

CRT­1425

13.7 ­ 14.8

±.20

2.0:1

2.0

Optional

CRT­1785

17.3 ­ 18.4

±.25

2.0:1

2.0

Optional

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: CRT­625­IO is a 5.8­6.7 GHz detector with inner and outer DC blocks



Typical Operating Curves

CRT Series


Outline Drawing