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-communication.com • Web: www.shf-communication.com

Datasheet
SHF DF65R
65 GHz Broadband DC Feeder

SHF reserves the right to change specifications and design without notice – SHF DF65R - V001 - Feb 18, 2021

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Description
The SHF DF65R DC feeder allows supplying a DC voltage or current to a RF transmission line. The
inductance in the DC path rejects any unwanted frequency components beyond its cutoff frequency. Thesuperposition of the AC and DC signals is available at both RF ports. Based on SHF’s air line construction,
it offers resonance-free transmission up to 65 GHz. In addition to the low insertion loss, all products havean extremely low group delay ripple.

Applications


Optical Communications

High-Speed Pulse Experiments

Research and Development

Data Transmission

Configurations
A- Port 1: 1.85 mm female, Port 2: 1.85 mm maleC

- Port 1: 1.85 mm male, Port 2: 1.85 mm male

D- Port 1: 1.85 mm female, Port 2: 1.85 mm femaleOne of above configurations has to be chosen. For more information, please be referred to the mechanicaldrawing on the last page of this data sheet. The DC-port is always SMA female.

Options
HV50- High Voltage (maximum DC voltage extended to 50 V)

SHF reserves the right to change specifications and design without notice – SHF DF65R - V001 - Feb 18, 2021

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Specifications - SHF DF65R
Parameter

Unit Symbol

Min

TypMax

Conditions

Absolute Maximum Ratings
Maximum RF Input
w/o option

dBmPin max30

average power of a continuous 1signal, 50 Ω load and f ≥ 300 kHz

Maximum RF Input
with Opt. HV50

dBmPin max

30

average power of a continuous 1signal, 50 Ω load and f ≥ 6 MHz

Maximum DC Voltage
w/o option

V-16

16

difference between ports and between
ports to ground

Maximum DC Voltage
with Opt. HV50

V-50

50

difference between ports and between
ports to ground

Maximum DC Current

mA-400400

Case Temperature

Tcase°C

102550Electrical Characteristics (At 25°C case temperature, unless otherwise specified)High Frequency 3 dB Point

GHzfHIGH

65Low Frequency 3 dB PointkHz

fLOW

Insertion loss

dBS212>50 MHz <65 GHz

Reflection

dBS11 ; S22-15-10>50 MHz <30 GHz

Group Delay Ripple

psIsolationdBDC ResistanceΩ3.5

DC to RF portConnector
AC + DCDC

Ω

50

1.85 mm

Dimensionsmm

Weightgdepends on the device connected tothe dc port, please see page 5±50>30 GHz <65 GHz>50 MHz <50 GHz,
160 MHz aperture>50 MHz <65 GHz,18

please see page 5

Mechanical Characteristics

SMA
please see page 625

130 dBm (1 W) equals 20 V peak to peak for continuous sinusoidal signals. A pulsed excitation with an average of 1 W and thus
having significantly higher peaks is possible.
The maximum RF input power does not change in case a signal is applied to the DC port.
SHF reserves the right to change specifications and design without notice – SHF DF65R - V001 - Feb 18, 2021

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Typical S-Parameters for a DF65R

Aperture of group delay measurement: 160 MHz
S21 phase measurement has been compensated by propagation delay to visualize phase linearity.
SHF reserves the right to change specifications and design without notice – SHF DF65R - V001 - Feb 18, 2021

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Typical Low Frequency Response of AC Path
Measurements show how the low frequency response depending on the device connected to the dc port.
Open: blue ; 50 Ω Load: red ; Short: green

Typical Frequency Response of DC Path
This plot shows the isolation between DC and AC + DC ports. Measurement without applied DC voltage.

SHF reserves the right to change specifications and design without notice – SHF DF65R - V001 - Feb 18, 2021

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Mechanical Drawing

Ø2.2 x 11mm

Functional earth holes for 2mm banana plug

22.

2.5

Ø

2.5valid for all options
2.512.28

AC + DC

DC36.34012.28

AC + DC

22DC6.5(2x)32x6.3

40

M

13mm

AC + DC

31312.28

DC - 65 GHz

9.8

5.4

16V/0.4A

12.611.3

AC + DC

22DC(2x)1m

AC + DC

3m11.3DC - 65 GHz

6.5

1316V/0.4A

9.85.4

SHF DF-65R D
SN XXXXmm

12.6

SHF DF-65R C

6.3

3M
2x13

SN XXXX

1AC + DC

6.3

13406.3

M2x36.3(2x12.3)

DC - 65 GHz6.5

1316V/0.4A

9.8

5.4

SHF DF-65R A
SN XXXX2212.6

All dimensions in mm

SHF reserves the right to change specifications and design without notice – SHF DF65R - V001 - Feb 18, 2021

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