An 1.85mm DC Block is used to stop direct current from travelling through an RF signal path while allowing high-frequency signals to pass. This makes it useful when sensitive equipment needs protection from unwanted DC voltage.
For systems working at very high frequencies, connector quality and electrical performance matter. A suitable DC block can help maintain signal integrity while separating the DC path from the RF path.
The FR5 GDCB 67G 185E from Flexi RF covers 10 MHz to 67 GHz and uses 1.85mm male and female connections. Its 50 Ohm design suits demanding microwave and millimetre wave setups.
At frequencies reaching tens of gigahertz, small electrical losses can affect measurement results. A DC block should therefore match the requirements of the complete RF setup.
Key points to check include
● Operating frequency range
● Connector gender and series
● Impedance
● Insertion loss
● VSWR
● Maximum input power
● Temperature range
● Connector durability
The referenced Flexi RF model has insertion loss up to 0.9 dB, VSWR below 1.50 and a maximum input power rating of 2 watts. Its stainless steel passivated construction and minimum 500 mating cycles make it suitable for repeated laboratory and production use.
We can find DC blocks in test and measurement systems, RF communication equipment, industrial electronics, and military and space applications. They are especially useful where a DC component could interfere with an RF device or measurement instrument.
When selecting accessories, connector compatibility should also be considered. An MMPX cable may suit compact RF connections in certain systems, but its connector format and electrical specifications must match the equipment being connected.
Before purchasing, check the complete signal chain rather than focusing only on frequency. Confirm connector types, impedance, power handling and environmental requirements.
For laboratory setups, low insertion loss and controlled VSWR can be important. For field or production use, mechanical strength, mating cycles and operating temperature may carry more weight.
Flexi RF Inc offers same-day shipping, custom design support, a wide range of RF and microwave products, and access to experienced RF engineers. These services can be useful when standard specifications do not fully match a particular setup.
It prevents DC voltage from passing through an RF connection while allowing the intended RF signal to continue.
The required range depends on the application. The referenced model operates from 10 MHz to 67 GHz.
Yes. Lower insertion loss can help preserve signal levels, particularly in high-frequency measurement systems.
Only when the connector types and electrical specifications are compatible; an adapter may be required when they differ.
Choosing the right 1.85mm DC Block requires attention to frequency, impedance, loss, VSWR, power and mechanical specifications. With suitable RF accessories and technical support from Flexi RF Inc, high-frequency systems can be configured with greater confidence and consistency.