SHF Communication Technologies AG
Wilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone ++49 30 / 772 05 10 • Fax ++49 30 / 753 10 78
E-Mail: sales@shf.de • Web: http://www.shf.deDatasheet
SHF 818
RF Clock Amplifier

SHF reserves the right to change specifications and design without notice – SHF 818 - V003 – 08.07.2009

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Specifications – SHF 818
Parameter

SymbolUnit

MinHigh frequency 3 dB point

fHIGH

GHz41

Low frequency 3 dB point

fLOWGHzGainGdB27

VmA

00Gain control function

Typ30

P01dBdBm(V)24Output power at saturation

PsatdBm(V)29

Input return loss

S11dB

8

Output return loss

S22dB

Supply voltage
Power consumption

dBmUsConditions

36

Output power at 1 dBcompression

Maximum input powerMax

inverting-5
10

reduces gain by morethan 3 dB

10>36 GHz <41GHz

10>30 GHz <43 GHz

410V

9W

9.9in operation
without power supply
11

1.1 A, reverse voltage
protectedusing 9 V supply
voltage

Input connector

K (2.9mm) female

Output connector

K (2.9mm) male

Dimensions (LxWxH)

mm

51x35x13.5excluding connectors

Saturation power
Red (top):
3dB compression;
Green (middle):
2dB compression;
Blue (bottom):
1dB compression.

Typical performance results of a prototype amplifier
SHF reserves the right to change specifications and design without notice – SHF 818 - V003 – 08.07.2009

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S-Parameters, group delay and phase response

Aperture of group delay measurement: 81 MHz

SHF reserves the right to change specifications and design without notice – SHF 818 - V003 – 08.07.2009

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4244
47,4

Power
supplyOutputOutput Bias-T(Optional)

9,5

04: Built-in bias-T on output

GainControl

03: DC return on output

Input

02: Built-in bias-T on input

Input Bias-T(Optional)

01: DC return on input

Top view

 Available Options

4,8
7,15
10,6
13,5

Side view

The following options cannot becombined:
01 and 02
03 and 04
02 and 04

4,9
16,5
42

3

32
35

Bottom view

M2,5x5 (4x)

31
48
51

SHF reserves the right to change specifications and design without notice – SHF 818 - V003 – 08.07.2009

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User Instructions
ATTENTION !
Electrostatic sensitive GaAs FET amplifier1.

To prevent damage through static charge build up, cables should be always discharged before
connecting them to the amplifier!

2.

Attach a 50 Ohm output load before supplying DC power to the amplifier!

3.

The supply voltage can be taken from any regular 9…12V, 1.1A DC power supply and can be connectedto the supply feed-through filter via an ON / OFF switch.

4.

The minimum supply voltage is 9V. A higher one increases the power dissipation of the internal voltage
stabilizer.

5.

Using a 3 dB or 6 dB input attenuator will result in a 6 dB or 12 dB increase of the input return loss. For
minimal degradation these attenuators should have a bandwidth specification of >50 GHz (V/ 1.85mmattenuators)!

6.

An input signal of about 0.63 Vpp equivalent to 0 dBm will produce the full swing output of 17 Vpp

7.

We recommend that the amplifier be used in conjunction with a 50 Ohm load. Use of a reflective load forextended periods should be avoided.

8.

The input voltage should never be greater than 1 Vpp equivalent to 4 dBm input power.
The input voltage without DC power supplied to the amplifier should never be greater than 2 Vppequivalent to 10 dBm input power.

SHF reserves the right to change specifications and design without notice – SHF 818 - V003 – 08.07.2009

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