SHF Communication Technologies AG
Wilhelm-von-Siemens-Str. 23D • 12277 Berlin • Germany
Phone +49 30 772 051-0 • Fax +49 30 753 10 78
E-Mail: sales@shf.de • Web: http://www.shf.deDatasheet
SHF M804 BBroadband Amplifier

SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Description
The SHF M804 B broadband amplifier is the RoHS compliant successor of the popular SHF 804 M.
A bandwidth of more than 66 GHz offers the capability to amplify binary signals up to 100 Gbps.
The M804 B is a two-stage amplifier design, using proprietary monolithic microwave integrated circuits(MMICs) inside special carriers to achieve ultra-wide bandwidth and low noise performance. An internal
voltage regulation protects the amplifier against accidental reverse voltage connection and makes it
robust against line voltage ripple.

Ease of Use
Only a single 5 V supply is needed for operation.
Upon delivery, the amplifier is already set to deliver maximum gain and 50% crossing. For operation
under these conditions the appropriate pins can be left floating. However, in case gain and crossing
shall be modified, this can be done just by applying another bias. For more detailed information seepage 9.

Available Options
MP:Matches the phase of two amplifiers

SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Specifications - SHF M804 B
Parameter

Unit

SymbolMin

TypMax

Conditions

Maximum RF Input Powerin OperationdBm
V

Pin max

4
1

peak to peak voltage

Maximum RF Input Powerwithout Power SupplydBm
VPin max

10
2

peak to peak voltage

DC Voltage at RF Input

V±9AC coupled input

DC Voltage at RF Output

V±8AC coupled output

Positive Supply Voltage

V4.555.5

Gain Control Voltage

V-6-5…0+6will not exceed 0.02 ACrossing Control Voltage

V-6-5…+5+6will not exceed 0.02 A

103545Absolute Maximum Ratings

Case Temperature

11Tcase°Cmax. 0.3 A
reverse voltage protected

If operated with heat sink (part of the delivery) at room temperature there is no need for additional cooling.

SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Specifications – SHF M804 B
Parameter

UnitSymbol

MinTypMaxConditions

Electrical Characteristics (At 35°C case temperature, unless otherwise specified)High Frequency 3 dB Point

GHz

fHIGH

66

Low Frequency 3 dB PointkHz

fLOWGaindB

S21Max. Gain ReductiondB

Output Power at 1 dB
Compression

dBm
V

P01dB

112.2

10 MHz…28 GHz

Output Power at 2 dB
Compression

dBm
V

P02dB

132.8

10 MHz…28GHz

Output Power at 3 dB
Compression

dBm
V

P03dB

15
3.5

10 MHz…28 GHz

Max. RF Input for LinearOperationdBmVPin lin

Crossing Control
Range%

Input ReflectiondB

Output Reflection

dB90
21222.53

non-inverting
measured at Pin=-20 dBm

4< 2.5 Vpppeak to peak voltage

peak to peak voltage

peak to peak voltage-110.18-4

I.e. Pout ≤ P01dB
peak to peak voltage

4> 2.5 Vpp

S11-9-3< 30 GHz

S22-9-5< 50 GHz< 65 GHz< 65 GHz
20%...80%, 3 V ≤ Vout ≤ 4 V

Rise Time/Fall Time

pstr/tf

610

Deconvoluted

2,32Full Setup

3 V ≤ Vout ≤ 4 V @ 80 Gbps

JitterfsGroup Delay Ripple

psPower Consumption

W23JRMS

3505001.22,3500600

Deconvoluted±50

40 MHz…40 GHz, 160 MHz aperture

Full Setup

25 V supply voltage

Measured with the following setup: SHF 603 A MUX -> DUT (SHF M804 B) -> Agilent 86100C with 70 GHz sampling head and precision time base.
Calculation based on typical results of setup without DUT :𝑡𝑟 /𝑡𝑓 𝑑𝑒𝑐𝑜𝑛𝑣𝑜𝑙𝑢𝑡𝑒𝑑 = √(𝑡𝑟 /𝑡𝑓 𝑓𝑢𝑙𝑙 𝑠𝑒𝑡𝑢𝑝 )2 − (𝑡𝑟 /𝑡𝑓 𝑠𝑒𝑡𝑢𝑝 𝑤/𝑜 𝐷𝑈𝑇 )2 = √(𝑡𝑟 /𝑡𝑓 𝑓𝑢𝑙𝑙 𝑠𝑒𝑡𝑢𝑝 )2 − 8 𝑝𝑠 2
2𝐽𝑅𝑀𝑆 𝑑𝑒𝑐𝑜𝑛𝑣𝑜𝑙𝑢𝑡𝑒𝑑 = √(𝐽𝑅𝑀𝑆 𝑓𝑢𝑙𝑙 𝑠𝑒𝑡𝑢𝑝 )2 − (𝐽𝑅𝑀𝑆 𝑠𝑒𝑡𝑢𝑝 𝑤/𝑜 𝐷𝑈𝑇 ) = √(𝐽𝑅𝑀𝑆 𝑓𝑢𝑙𝑙 𝑠𝑒𝑡𝑢𝑝 )2 − 300 𝑓𝑠 2

SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Parameter

Unit

Symbol

MinTypMax

Conditions

Mechanical Characteristics
4

Input Connector

1.85 mm (V) female

Output Connector

1.85 mm (V) male44

Other gender configurations are available on request.
Other connector types, e.g. 2.92mm (K) or Mini-SMP (GPPO) connectors, are also available but may impact the bandwidth and reflection
characteristic.

SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Typical S-Parameters, Group Delay and Phase Response

Aperture of group delay measurement: 160 MHz

SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Typical Noise Figure
The measurement had been performed using a FSW85 Spectrum Analyzer by Rhode & Schwarz. The
noise figure defines the degradation of the signal-to-noise ratio when the signal passes the amplifier. An
ideal amplifier would amplify the noise at its input along with the signal. However, a real amplifier adds
some extra noise from its own components and degrades the signal-to-noise ratio. Please note that thisapplies to small signals only. When the amplifier is used close to or in its saturation region additional
non-linear effects will impact the signal-to-noise ratio and the signal waveform.

1098Noise Figure [dB]765432
100

5

1015

20

2530

35

40

4550

Frequency [GHz]SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Typical Binary Waveforms
Measurements had been performed using a SHF 603 A MUX and an Agilent 86100C DCA withPrecision Time Base Module (86107A) and 70 GHz Sampling Head (86118A).

Eye Amplitude: Input ~440 mV ⇒ Output ~3.7 V

Input Signal @ 60 Gbps

Output Signal @ 60 Gbps

Input Signal @ 80 Gbps

Output Signal @ 80 Gbps

Input Signal @ 100 Gbps

Output Signal @ 100 Gbps

SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Handling Instructions
To operate the amplifier a positive supply voltage of approximately +5 V must be applied.
The gain can be adjusted by applying a voltage of 0 to -5 V. If this pin is left open, the amplifier will havemaximum gain. By reducing the gain the crossing will shift. Typical characteristics are shown in thefollowing diagram for an input voltage of 0.2 V with 50% crossing.

642

Gain [dB]0-2

Crossing shift[%]-4-60-1-2-3-4-5

Gain Control Voltage [V]The crossing can be adjusted by applying a voltage of -5 to +5 V. If this pin is left open a crossing ofapproximately 50 % is achieved. The range depends on the input voltage. Typical characteristics areshown in the following diagram for input voltages of 0.2, and 0.4 V with 50% crossing.

60

Crossing [%]55
500.2 V
0.4 V

4540-505Crossing Control Voltage [V]SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Typical Low Frequency Response (<40 MHz)

Typical Saturation power

Top (red): 3 dB compression;
Middle (green): 2 dB compression;
Bottom (blue): 1 dB compression

SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Mechanical Drawing with Heat Sink
2xM
5m
4xm

34

6.5

10.6
9.5

46

5.6

nc

1.7

2422dB

90kHz - 66GHz
P03dB: 16dBm

48358

SHF M804 B+5V
0.3A

9.4

Gain
0 ... -5V2Crossing-5V ... +5V

9.3

10.5
20.4

55
30.4
20.4
10.5

27
14.4
10.6
9.5

5.6

All dimensions in mm

Pin assignment might change if a bias tee option is chosen.
For permanent mounting remove the heat sink from the amplifier. In that case please ensure that
adequate cooling of the amplifier is guaranteed. It is recommended to use thermal paste or a thermal
gap pad for the mounting. In order to separate the heat sink from the amplifier, remove the four screws
on the heat sink. Please note, thermal paste is used between the heat sink and the amplifier housing.

SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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Mechanical Drawing without Heat Sink
4xM
52xm

13.6m

4.62

9.8
6.1
5202.21822dB

90kHz - 66GHz
P03dB: 16dBm48358

ncSHF M804 B

Crossing-5V ... +5V+5V
0.3A

4.6

12.4

Gain
0 ... -5V

512.3

4.7

7.1
1727
177.1

6.1
52.2

All dimensions in mm

Please ensure that adequate cooling of the amplifier is guaranteed.

SHF reserves the right to change specifications and design without notice - SHF M804 B - V001 - May 24, 2018

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User Instructions
ATTENTION!
Electrostatic sensitive GaAs FET amplifi er

1.

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 4.5…5.5 V, 0.3 A DC power supply and can beconnected to the supply feed-through filter via an ON / OFF switch.

4.

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 of amplifier rise time, these attenuators should have a bandwidth specification ofgreater 50 GHz (V/ 1.85mm attenuators)!

5.

An input signal of about 0.45 Vpp will produce saturated output swing of about 4 Vpp.

6.

Higher input voltages will drive the amplifier’s output stage into saturation, leading to waveform peakclipping.

8.

Saturated output voltages can only be used without damage while the amplifier is connected to a 50
Ohm precision load with a VSWR of less than 1.2 or better than 20 dB return loss up to 40 GHz.

9.

While using a reflective load the output voltage has to be reduced to a safe operating level according
to the magnitudes of the reflections.
ATTENTION: At radio frequencies a capacitive load can be transformed to an inductive one throughtransmission lines! With an output stage driven into saturation this may lead to the immediate
destruction of the amplifier (within a few ps)!

10. 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 M804 B - V001 - May 24, 2018

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