A directional coupler can be used to monitor a signal on a RF path. The through path is bi-directional, but it only couples the RF signal in one direction. The coupled path is also bi-directional. A signal into the coupled port will be injected onto the RF path. Coupler models with high coupling values (i.e. […]
JFW model 75S-400 is a 75Ω solid-state RF switch. It has a 1P8T configuration and is available with F female connectors. It is a self-terminating design so all unused ports will self-terminate at 75 Ohms. The switch requires a +12Vdc supply Voltage. It is TTL controlled via eight parallel TTL control lines. TTL high turns […]
JFW model 57ZTT-2.2G is a coaxial impedance matching transformer. It operates 5-2200MHz. On the 50Ω side it is available with either BNC, N or SMA connectors. On the 75Ω side it is available with BNC, F or N connectors. This matching transformer allows you to connect a 50Ω device to a 75Ω device and have […]
JFW has added several new power divider/combiner models to our website. These 2Way, 4Way and 8Way models cover several common satellite communication bands. All of these models are 50 Ohm reactive design (i.e. Wilkinson design) with SMA female connectors. These models are ideal for fan-in/fan-out signal routing due to their low through path loss and […]
JFW model 50PA-1252 SMA is a 50 Ohm attenuator assembly that can be used to test WiFi 6 devices. The attenuator assembly operates 200-7125MHz and contains 48 individually controlled step attenuators with attenuation range 0-95dB x 1dB steps. Each attenuator has two ports that are both cabled to the rear panel with SMA female connectors. The […]
A step attenuator is a variable attenuator that can have its attenuation setting varied over an attenuation range by a specific dB step size. All attenuation settings are referenced to the insertion loss. This means that the minimum setting (0dB) is the insertion loss state of the step attenuator. For example programmable attenuator model 50P-1857 […]
A fixed attenuator has two main uses: decrease signal power level, improve poor VSWR. A fixed attenuator is a passive device with internal resistors whose resistive values are calculated base on the impedance (50 Ohm or 75 Ohm) and the desired attenuation value. The attenuation value is expressed in terms of decibel (dB). When the […]
Understanding the difference between reactive and resistive power dividers will help you create the best functionality for your RF testing setup. Their functionality is similar but yet different. Resistive Power Dividers Their construction is a star configuration. All ports are symmetrical. There is no common port with resistive type design. The star configurations functions as […]
The goal of this application note is to differentiate the three different types of electro-mechanical RF switch types. Each type has its own unique functionality and its own pros and cons. Understanding their differences is key to getting the functionality you require. There is a cost tradeoff for latching and failsafe/normally open functionality. Mechanically latching […]
When choosing a RF attenuator, there are a couple of questions about how you will be using the attenuator that determine which attenuator type is best for your application. Does the attenuation need to be variable or can it be a single fixed value? For fixed dB value use a fixed attenuator. For variable attenuation, […]