Telecoms, Datacoms, Wireless, IoT

RF variable attenuator

18 September 2020 Telecoms, Datacoms, Wireless, IoT

The 4205A-95.5 from API Technologies – Weinschel is a Programmable Attenuator that operates from 0,3 to 6000 MHz. It has an attenuation range from 0 to 95,75 dB with 0,25 dB steps, an insertion loss of less than 9 dB and a switching speed of 0,2 μs. The device can handle up to 23 dBm of CW and 28 dBm of pulsed input power. It requires an operating voltage from 3,3 to 16 V d.c. and consumes up to 25 mA of current.

The attenuator can be controlled using parallel (TTL compatible), I2C, SPI, UART, or USB interfaces. API Weinschel’s LabView-based USB Control Centre Software (AUCS) can also be used to control this series of digital attenuators. The AUCS software allows users to setup, control and perform tests and measurement over a standard USB 2.0 communication interface. It is available in a module that measures 66,0 x 63,5 x 13,8 mm with SMA-female connectors and is suitable for applications such as automated test equipment, MIMO, WiMAX, Wi-Fi, 2G/3G/4G, LTE/5G fading simulators, and engineering/production test lab environments.

Product details

• Part Number: 4205A-95.5.

• Manufacturer: API Technologies − Weinschel.

• Description: 95.75 dB programmable attenuator from 0.3 to 6000 MHz.

General parameters

• Type: Programmable, digital.

• Applications: Test equipment, 2G/3G/4G LTE/5G, WiMAX, WiFi.

• Frequency: 0,3 to 6000 MHz.

• Attenuation Range: 95,75 dB.

• Steps: 0,25 dB.

• Power: 0,631 W.

• IIP3: 50 dBm.

• Insertion Loss: 4,1 to 9 dB.

• Switching Time: 0,2 to 5 ms.

• Supply Voltage: 3,3 to 16 V d.c.

• Interface: TTL/Serial/Parallel, I2C, SPI, USB, UART.

• Current: 15 to 25 mA.

• Impedance: 50 Ohms.

• VSWR: 1,25:1 to 1,85:1.

• Package Type: Module with connectors.

• Connector: SMA, SMA – female.

• Operating Temperature: -20 to 85°C.

• Storage Temperature: -55 to 125°C.

• Grade: Commercial.

• RoHS: Yes.

For more information contact Andrew Hutton, RF Design, +27 21 555 8400,,


Share this article:
Share via emailShare via LinkedInPrint this page

Further reading:

V2X transceiver modules
30 September 2020, RF Design , Telecoms, Datacoms, Wireless, IoT
The VERA-P3 Series from u-blox are automotive grade 802.11p V2X (vehicle-to-everything) transceiver modules that operate in the 5,9 GHz frequency band. These automotive-grade modules are based on the ...

Voltage tuneable notch filter bank
30 September 2020, RFiber Solutions , Telecoms, Datacoms, Wireless, IoT
Atlanta Micro’s AM3129 is a miniature voltage-tuneable notch filter bank covering the 1,0 to 6,0 GHz frequency range in a 4 mm QFN package. Six notch filters and two bypass paths with SP8T switches on ...

Permanent mounting MIMO antenna for Wi-Fi
30 September 2020, RF Design , Telecoms, Datacoms, Wireless, IoT
The Ultima MA530 MIMO antenna from Taoglas is a low-profile, heavy-duty, fully IP67 waterproof external M2M antenna for use in transportation and remote monitoring applications. It provides high efficiency ...

SPST RF switch for high-performance aperture tuning
30 September 2020, Hi-Q Electronics , Telecoms, Datacoms, Wireless, IoT
Skyworks has introduced the SKY59272-707LF, a single-pole, single-throw (4xSPST) switch designed for antenna tuning applications that require ultra-low off-capacitance and low on-resistance. This device ...

Applications for RF electromechanical relay switches
30 September 2020, RF Design , Telecoms, Datacoms, Wireless, IoT
RF electromechanical switches are a key active device in many signal chains, including time-domain duplex communications and pulsed radar applications. Such switches can be as simple as a 3-port toggle ...

Diplexer for GNSS L1 and L2
31 August 2020, RF Design , Telecoms, Datacoms, Wireless, IoT
The Taoglas DXP.01.A is a diplexer for GNSS L1 and L2. This advanced compact SAW diplexer is for use in any navigation system application using the GPS/GALILEO L1, GLONASS L2 and BeiDou B2 bands. The ...

Miniature SMT noise sources
31 August 2020, RF Design , Test & Measurement
Pasternack has released a new series of miniature SMT packaged noise sources that are ideal for built-in test equipment, dithering for increased dynamic range of A/D converters and as a source for bit ...

Quectel unveils SA800U-WF premium smart module to enable computing and multimedia applications on Android OS devices
31 August 2020, iCorp Technologies , Telecoms, Datacoms, Wireless, IoT
Quectel Wireless solutions has launched its SA800U-WF premium smart module which features a built-in Android 9.0 or 10.0 operating system (OS). The new module features a high performance, low power 64-bit ...

Directional coupler
31 August 2020, RF Design , Telecoms, Datacoms, Wireless, IoT
The MC16-0222SM from Marki Microwave is a directional coupler with frequency DC to 22 GHz, coupling 16&nbspdB, directivity 14 to 23&nbspdB, insertion loss 1,2 to 3,5&nbspdB, and operating temperature ...

Bluetooth wearable tags for social distancing
31 August 2020, RF Design , Telecoms, Datacoms, Wireless, IoT
Nordic Semiconductor has announced that DigitalAlerts, an Eindhoven, Netherlands-based designer and manufacturer of smart digital warning systems, has selected Nordic’s nRF51822 Bluetooth Low Energy (Bluetooth ...