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Non-Blocking Matrix Switches

A non-blocking matrix switch is constructed with half of the matrix built with power dividers while the other half is built with switches. Whether the switches are on the input port half or the output port half depends on how you need the matrix switch to function. With power dividers on the input ports and switches on the output ports, each input signal is split to all of the output switches. This configuration allows for multiple output ports to be connected to the same input port simultaneously. Example block diagrams for non-blocking matrix switches are shown below the model selection table.

The advantage of a non-blocking matrix over a blocking matrix is its greater connection flexibility. An input port (built with a power divider) is always available to be connected to any output port (built with a switch). However, the power dividers cause a non-blocking matrix to have greater insertion loss than a blocking matrix. The power dividers also decrease the isolation between channels. In the event that two output ports (built with switches) are switched to receive the same input signal (input port built with a power divider), the isolation between output ports is determined by the isolation of the power divider. Typical reactive power divider/combiners have 20dB isolation. If you need your matrix switch to have more than 20dB of output port to output port isolation, then you will need to use a blocking matrix instead of a non-blocking matrix.

Below is a sortable table containing our online non-blocking matrix switch models. If you can’t find a model that meets your requirements, please contact us. One of our engineers will work with you to pick out an existing model or design a custom model for your application. JFW does not charge NRE’s and our pricing for custom models is in-line with our catalog models.

Sample Test Programs
Ethernet & RS-232 Commands
GPIB Commands

Click the column headers to sort our online models. For your specific application, please contact JFW for assistance or use our Inquiry Form.

JFW Model #ImpedanceConfigurationUnused PortsFrequency StartFrequency StopRF Input PowerRF Connectors
50MS-28750 Ohms24 x 4 Non-Blocking RF Matrix SwitchAbsorptive20 MHz2000 MHz+20 dBmN, SMA
50MS-28850 Ohms8 x 8 Non-Blocking RF Matrix SwitchAbsorptive20 MHz1000 MHz+20 dBmN
50MS-29850 Ohms24 x 6 Non-Blocking w/In-Line AttenuatorsAbsorptive700 MHz3000 MHz+20 dBmN
50MS-29950 Ohms8 x 4 Non-Blocking RF Matrix SwitchAbsorptive700 MHz3000 MHz+20 dBmSMA
50MS-30050 Ohms8 x 8 Non-Blocking RF Matrix SwitchAbsorptive700 MHz3000 MHz+20 dBmSMA
50MS-30450 Ohms6 x 6 Non-Blocking RF Matrix SwitchAbsorptive2000 MHz6000 MHz+20 dBmSMA
50MS-31350 Ohms4 x 4 Non-Blocking RF Matrix SwitchAbsorptive700 MHz3000 MHz+30 dBmN
50MS-33550 Ohms8 x 16 Non-Blocking RF Matrix SwitchAbsorptive700 MHz3000 MHz+20 dBmSMA

Non-Blocking Matrix Switch Examples

A non-blocking matrix switch is constructed with switches as half the matrix and with power dividers as the other half of the matrix. The location of the switches and power dividers depends on how you want the matrix to function. In the below examples, the input ports are built with power divider/combiners and the output ports are built with switches. With this configuration, an input signal can be connected to multiple (or all) output ports simultaneously. The number of active paths through the matrix is limited to the number of ports that are built with switches.

3 x 3 Non-Blocking Matrix w/ Output ports as Switches > maximum of 3 active paths
8 x 4 Non-Blocking Matrix w/ Output ports as Switches > maximum of 4 active paths
4 x 8 Non-Blocking Matrix w/ Output ports as Switches > maximum of 8 active paths
2 x 4 Non-Blocking Matrix w/ Output ports as Switches > maximum of 4 active paths

Block Diagram #1
This block diagram illustrates the construction of a 3 X 3 non-blocking matrix switch. It shows all of the connectivity between the input ports and the output ports. The input ports are built with 3-way power divider/combiners. The output ports are built with switches. The power divider allows an input port to be able to connect to multiple output ports simultaneously.

Block Diagram #2
This block diagram shows one possible setting of a 3 X 3 non-blocking matrix switch. There are three input signals (blue, red, green). The power dividers split up the input signals so that each input signal is available to all output ports at all times. The switches limit the matrix to having only three active paths, but the power dividers make each input available to multiple outputs simultaneously.

Block Diagram #3
This block diagram shows another possible setting of a 3 X 3 non-blocking matrix switch. There are three input signals (blue, red, green). The power dividers split up the input signals so that each input signal is available to all output ports at all times. All of the output switches are set to input 3. The RF signal for Input 3 is connected to all output ports simultaneously.

Capabilities & Options

Custom Models
The models listed in the above table showcase some of our standard RF matrix switches. However, most of JFW’s test system business involves custom designed models. JFW does not charge NRE’s for custom models. We encourage you to email us your specific requirement (sales@jfwindustries.com). We will respond with a ROM (rough order of magnitude) quote in 1-2 days.

Remote Commands
JFW has standard remote commands for GPIB, Ethernet, and RS-232 controlled models. The command syntax is simple and allows easy control of the RF path settings. In addition to our standard commands, JFW can also provide customer specific commands upon request.

Test Software
JFW provides a GUI test program with all Ethernet and RS-232 controlled test systems. The test software for RF matrix switches has all of the remote commands built in for easy testing. Check out our sample test programs to see for yourself.

Options
Impedance: 50 Ohm or 75 Ohm models available
Remote Control: Ethernet, RS-232, GPIB, or TTL
Manual Control: Keypad and display
Enclosures: Benchtop or 19″, 23″, 24″ rack enclosures
Supplied Power: AC, Dual redundant AC, or DC powered
RF Connectors: BNC, TNC, SMA, N, etc.
Attenuators: Electro-mechanical (up to 18GHz) or Solid-State (up to 6GHz)

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