RF & Microwave
Passive Components
Bias Tees
Diplexers
DC Blocks
Attenuators
Power Dividers & Splitters (NEW)
Terminations
Pick-Off Tees (NEW)
DC Feeders
Filters
Support
Bias Tees
A RF Bias Tee is a passive electronic component to inject DC (direct current) to a RF transmission line, while simultaneously allowing the passage of RF signals. Due to our air line construction, all SHF bias tees provide resonance-free transmission over the whole specified operating frequency range.
Unless otherwise stated, parameters are minimum or maximum values. Such specifications are guaranteed and should not be confused with typical values from other suppliers!
45 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth | Max. DC Voltage | Max. DC Current |
|---|---|---|---|---|
| 1 | SHF BT45R | 20 kHz – 45 GHz | ± 16 V | ± 400 mA |
| 2 | SHF BT45R | HV100 | 800 kHz – 45 GHz | ± 100 V | ± 400 mA |
| 3 | SHF BT45R | HV200 | 4 MHz – 45 GHz | ± 200 V | ± 400 mA |
| 4 | SHF BT45R | HC1000 | 100 kHz – 45 GHz | ± 16 V | ± 1000 mA |
| 5 | SHF BT45R | HC2000 | 500 kHz – 45 GHz | ± 16 V | ± 2000 mA |
| 6 | SHF BT45R | HVC100/1000 | 800 kHz – 45 GHz | ± 100 V | ± 1000 mA |
65 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth | Max. DC Voltage | Max. DC Current |
|---|---|---|---|---|
| 1 | SHF BT65R | 50 kHz – 65 GHz | ± 16 V | ± 400 mA |
| 2 | SHF BT65R | HV100 | 3 MHz – 65 GHz | ± 100 V | ± 400 mA |
| 3 | SHF BT65R | HC800 | 100 kHz – 65 GHz | ± 16 V | ± 800 mA |
| 4 | SHF BT65R | HVC100/800 | 3 MHz – 65 GHz | ± 100 V | ± 800 mA |
110 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth | Max. DC Voltage | Max. DC Current |
|---|---|---|---|---|
| 1 | SHF BT110R | 50 kHz – 110 GHz | ± 10 V | ± 400 mA |
| 2 | SHF BT110R | HV25 | 1 MHz – 110 GHz | ± 25 V | ± 400 mA |
Diplexers
Simplified, a RF Diplexer is a Bias-Tee with a certain bandwidth in the low frequency path. Therefore, it can be used to combine or separate a low frequency (LF) and a high frequency (HF) signal. The main function of a diplexer is to allow the simultaneous transmission or reception of two RF signals over a single transmission line or antenna while ensuring isolation between different frequency bands.
Unless otherwise stated, parameters are minimum or maximum values. Such specifications are guaranteed and should not be confused with typical values from other suppliers!
45 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth HF-Path | Bandwidth LF-Path | Max. LF Voltage | Max. LF Current |
|---|---|---|---|---|---|
| 1 | SHF DX45R | 90 MHz – 45 GHz | DC – 25 MHz | ± 20 V | ± 400 mA |
| 2 | SHF DX45R | HVC50/1000 | 100 MHz – 45 GHz | DC – 25 MHz | ± 50 V | ± 1000 mA |
| 3 | SHF DX45R | HVC100/2000 | 100 MHz – 45 GHz | DC – 25 MHz | ± 100 V | ± 2000 mA |
| 4 | SHF DX45R | X01 | 1200 MHz – 32 GHz | DC – 600 MHz | ± 50 V | ± 1000 mA |
| 5 | SHF DX45R | X02 | 3000 MHz – 40 GHz | DC – 1000 MHz | ± 50 V | ± 1000 mA |
65 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth HF-Path | Bandwidth LF-Path | Max. LF Voltage | Max. LF Current |
|---|---|---|---|---|---|
| 1 | SHF DX65R | 90 MHz – 65 GHz | DC – 25 MHz | ± 20 V | ± 400 mA |
| 2 | SHF DX65R | HV100 | 90 MHz – 65 GHz | DC – 25 MHz | ± 100 V | ± 400 mA |
110 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth HF-Path | Bandwidth LF-Path | Max. LF Voltage | Max. LF Current |
|---|---|---|---|---|---|
| 1 | SHF DX110R | 1 GHz – 110 GHz | DC – 50 MHz | ± 20 V | ± 400 mA |
DC Blocks
Unless otherwise stated, parameters are minimum or maximum values. Such specifications are guaranteed and should not be confused with typical values from other suppliers!
45 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth | Max. DC Voltage | Max. RF Power |
|---|---|---|---|---|
| 1 | SHF DCB45R | 30 kHz – 45 GHz | ± 25 V | 30 dBm |
| 2 | SHF DCB45R | HV100 | 700 kHz – 45 GHz | ± 100 V | 30 dBm |
| 3 | SHF DCB45R | HV200 | 3.8 MHz- 45 GHz | ± 200 V | ± 200 V |
65 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth | Max. DC Voltage | Max. RF Power |
|---|---|---|---|---|
| 1 | SHF DCB65R | 50 kHz – 65 GHz | ± 16 V | 30 dBm |
| 2 | SHF DCB65R | HV100 | 3 MHz – 65 GHz | ± 100 V | 30 dBm |
110 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth | Max. DC Voltage | Max. RF Power |
|---|---|---|---|---|
| 1 | SHF DCB110R | 150 kHz – 110 GHz | ± 10 V | 30 dBm |
| 2 | SHF DCB110R | HV50 | 1.1 MHz – 110 GHz | ± 50 V | 30 dBm |
Attenuators
Our RF fixed attenuators are designed to reduce the amplitude of a signal with minimal distortion to control signal strength, prevent overloading of sensitive components, or match signal levels between different parts of a system.
Unless otherwise stated, parameters are minimum or maximum values. Such specifications are guaranteed and should not be confused with typical values from other suppliers!
67 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth | Attenuation |
|---|---|---|---|
| 1 | SHF ATT67 A | 3 dB | DC – 67 GHz | 3 |
| 2 | SHF ATT67 A | 6 dB | DC – 67 GHz | 6 |
| 3 | SHF ATT67 A | 8 dB | DC – 67 GHz | 8 |
| 4 | SHF ATT67 A | 9 dB | DC – 67 GHz | 9 |
| 5 | SHF ATT67 A | 10 dB | DC – 67 GHz | 10 |
| 6 | SHF ATT67 A | 13 dB | DC – 67 GHz | 13 |
| 7 | SHF ATT67 A | 16 dB | DC – 67 GHz | 16 |
| 8 | SHF ATT67 A | 20 dB | DC – 67 GHz | 20 |
110 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth | Attenuation |
|---|---|---|---|
| 1 | SHF ATT110 A | 3 dB | DC – 110 GHz | 3 |
| 2 | SHF ATT110 A | 6 dB | DC – 110 GHz | 6 |
| 3 | SHF ATT110 A | 8 dB | DC – 110 GHz | 8 |
| 4 | SHF ATT110 A | 9 dB | DC – 110 GHz | 9 |
| 5 | SHF ATT110 A | 10 dB | DC – 110 GHz | 10 |
| 6 | SHF ATT110 A | 13 dB | DC – 110 GHz | 13 |
| 7 | SHF ATT110 A | 16 dB | DC – 110 GHz | 16 |
| 8 | SHF ATT110 A | 20 dB | DC – 110 GHz | 20 |
Terminations (50 Ω Loads)
A RF Termination, aka a “RF Load” or a “Dummy Load” is used to absorb RF energy and terminate RF transmission lines or circuits. SHF terminations are 50 Ohm resistive loads perfectly preventing signal reflections and ensuring exact impedance matching within the system.
Unless otherwise stated, parameters are minimum or maximum values. Such specifications are guaranteed and should not be confused with typical values from other suppliers!
| wdt_ID | P/N & Data Sheet | Bandwidth | Min. Return Loss |
|---|---|---|---|
| 1 | SHF TRM110 A | DC – 110 GHz | 10 dB |
Power Dividers & Power Splitters
Both, RF Power Dividers (PDV) and RF Power Splitters (PSP) evenly halve the input into two output signals, resulting in ~ 6 dB loss from the input to one output (ideally). For both devices, the two output signals maintain perfect amplitude and phase matching. Still, there are differences between PDVs and PSPs:
Power Dividers (PDV)
- Are based on a three-resistor design (all having ~16.7 Ω).
- Same impedance (50 Ω) is seen at all ports.
- Allow operation in reverse configuration as “power combiner”.
Power Splitters (PSP)
- Are based on a two-resistor design (both having 50 Ω).
- The impedance seen at the outputs is ~83.3 Ω, in order to guarantee an optimized effective output match when the splitter is used in leveling loops and ratio measurement systems.
- No reverse configuration is possible (input and output ports are univocally marked).
Unless otherwise stated, parameters are minimum or maximum values. Such specifications are guaranteed and should not be confused with typical values from other suppliers!
| wdt_ID | P/N & Data Sheet | Type | Bandwidth | Max. Amplitude Difference | Max. Phase Difference |
|---|---|---|---|---|---|
| 1 | SHF PDV18 A | Power Divider | 18 | 0.5 dB | 2° |
| 2 | SHF PDV67 A | Power Divider | 67 | 0.6 dB | 8° |
| 3 | SHF PDV110 A | Power Divider | 110 | 1.2 dB | 15° |
| 4 | SHF PSP110 A | Power Splitter | 110 | 1.2 dB | 15° |
Pick-Off Tees
A Pick-Off Tee extracts a small portion of the signal from the main line and outputs it at the pick-off port. This allows for signal monitoring without significantly altering the original signal. The SHF POTs are available with two coupling values: 12 and 20 dB (i.e., ~6% and ~1% of the signal power is available at the pick-off port, respectively).
Pick-Off Tees are bi-directional, making it suitable for both signal extraction and injection into the transmission line. They are extremely broadband, with a low frequency range down to DC and a high frequency range in excess of 110 GHz.
Unless otherwise stated, parameters are minimum or maximum values. Such specifications are guaranteed and should not be confused with typical values from other suppliers!
67 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth | Coupling Value |
|---|---|---|---|
| 1 | SHF POT67 A | 12 dB | DC - 67 GHz | 12 |
| 3 | SHF POT67 A | 20 dB | DC - 67 GHz | 20 |
110 GHz
| wdt_ID | P/N & Data Sheet | Bandwidth | Coupling Value |
|---|---|---|---|
| 1 | SHF POT110 A | 12 dB | DC - 110 GHz | 12 |
| 3 | SHF POT110 A | 20 dB | DC - 110 GHz | 20 |
DC Feeders
A DC-Feeder is a bias tee without the capacitor. Therefore, it provides slightly lower insertion loss in case it is connected to an AC-coupled device which already has a capacitor on its input.
Unless otherwise stated, parameters are minimum or maximum values. Such specifications are guaranteed and should not be confused with typical values from other suppliers!
| wdt_ID | P/N & Data Sheet | Bandwidth | Max. DC Voltage | Max. DC Current |
|---|---|---|---|---|
| 1 | SHF DF45R | DC – 45 GHz | ± 16 V | ± 400 mA |
| 2 | SHF DF45R | HV50 | DC – 45 GHz | ± 50 V | ± 400 mA |
| 3 | SHF DF65R | DC – 65 GHz | ± 16 V | ± 400 mA |
| 4 | SHF DF65R | HV50 | DC – 65 GHz | ± 50 V | ± 400 mA |
| 5 | SHF DF110R | DC -110 GHz | ± 16 V | ± 400 mA |
| 6 | SHF DF110R | HV50 | DC -110 GHz | ± 50 V | ± 400 mA |
Linear Equalization Filters
A Linear Equalization Filter can be used to offset signal distortion e.g., resulting from bandwidth limitations. This compensation is achieved through a linearly decreasing insertion loss up to the “Nyquist-Frequency,” counteracting an increase in insertion loss along the signal transmission path, such as in an RF cable. The SHF EQ-Series features a fixed “Nyquist-Frequency” and a fixed “Filter Peaking Value,” rendering these components passive, compact, lightweight, and cost-effective. If a more flexible filter is required, we would kindly like to guide your attention to the active filters in our RF & Microwave Modules Product Section.
| wdt_ID | P/N & Data Sheet | Typ. Nyquist Frequency | Typ. Filter Peaking Value* |
|---|---|---|---|
| 1 | SHF EQ16 A | 1.5 | 16 GHz | 1.5 dB |
| 2 | SHF EQ16 A | 3 | 16 GHz | 3 dB |
| 3 | SHF EQ16 A | 6 | 16 GHz | 6 dB |
| 4 | SHF EQ25 A | 1.5 | 25 GHz | 1.5 dB |
| 5 | SHF EQ25 A | 3 | 25 GHz | 3 dB |
Support – RF Passive Components
Literature
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General Info
Up to 110 GHz
SHF’s microwave components are broadband devices suitable up to 110 GHz.
Our SHF BIAS TEES are well known but perhaps a slight variation does suit your application even better. DIPLEXERS are bias tees with a certain bandwidth in the low frequency path to combine or separate high frequency and low frequency signals into or out of a single line. DC-FEEDERS are bias tees without the capacitor. Therefore, it provides slightly lower insertion loss in case it is connected to an AC-coupled device which already has a capacitor on its input. Based on our air line construction, these passive components provide resonance-free transmission over the entire operating range.
The SHF ATT110 A precision fixed ATTENUATORS, as well as the SHF TRM110 A TERMINATIONS (50 Ohm loads) are available in a wide variety of different connector combinations.
Our broadband resistive POWER DIVIDERS split a signal into two equal parts, or combine two signals. They have a characteristic impedance of 50 ohms when the output ports are terminated with 50 ohm loads.
A typical application for a broadband LINEAR EQUALIZATION FILTER is to compensate for distortion caused by the lack of bandwidth of a DUT (e.g. a RF cable assembly).
Brochures
Application and Tutorial Notes
- Application Note: Impact of Bias Tees on Communication Signals
Contains data and advice on some issues which should be considered when selecting a bias tee. - Tutorial Note: Important RF and MW Parameters for Broadband Communication
Phase response, group delay, S-parameters, VSWR, noise figure.
Discontinued Products
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Discontinued Bias-Tees
| P/N | Type |
|---|---|
| SHF 125 (1mm) | 110 GHz Bias Tee |
| SHF BT45 | 45 GHz Bias Tee |
| SHF BT65 | 65 GHz Bias Tee |
| SHF BT110 | 110 GHz Bias Tee |
Discontinued DC-Blocks
| P/N | Type |
|---|---|
| SHF DCB45 | 45 GHz DC-Block |
| SHF DCB65 | 65 GHz DC-Block |
| SHF DCB110 | 110 GHz DC-Block |