How to Choose the Right Solderless PCB Connector for High-Frequency Applications
Posted by Boodle Mart on
Selection of the connector to use in a high-frequency PCB is not simply a matter of identifying a component that fits. The connection should have signal integrity, offer regular contact, and be appropriate to the physical layout of the board. An appropriate solderless PCB connector may be a convenient way to simplify RF testing and enable repeated measurements where the electrical and mechanical requirements are suitable to the application.
What Makes a Solderless PCB Connector Suitable for High-Frequency Signal Transmission?
Small variations in the signal path can cause measurement errors at high frequencies. A connector that is good at lower frequencies can cause undesired reflections or loss when operating at microwave and millimetre-wave frequencies.
Look for these characteristics when comparing options:
● Impedance matching: A controlled 50-ohm interface helps maintain continuity between the test equipment and PCB.
● Stable contact: Consistent contact pressure helps produce repeatable measurements during testing.
● Suitable frequency range: The connector’s rated bandwidth should cover the highest frequency required by the application.
Low signal discontinuity: The transition between the connector and PCB should minimise unwanted reflections.
How Does a 2.92 Vertical Launch PCB Connector Support Reliable RF Testing?
A 2.92 vertical launch PCB connector is often utilized in microwave testing where consistent performance and reproducible outcomes are important. These connectors are especially convenient for engineers who are analyzing RF circuits, prototypes, and high-frequency PCB designs.
A 2.92 mm connector can be used for 40 GHz measurement with the appropriate test equipment and properly designed PCB transition, depending on the model used.
Review the mounting configuration, supported PCB thickness, and suggested launch geometry of the connector before choosing one. These specifications assist in deciding whether it will fit on your board without interfering with the measurement arrangement.
When Should You Choose a 1.85 Vertical Launch PCB Connector for Millimeter-Wave Applications?
In higher frequency regions where testing is involved, connector selection is more challenging. A 1.85 vertical launch PCB connector is intended to be used in applications that demand higher frequencies than most 2.92 mm interfaces.
Chosen 1.85 mm models achieve a frequency of 67 GHz, thus being applicable to some millimetre-wave measurements.
Consider this option when:
● Your test frequency exceeds the practical operating range of a 2.92 mm connector.
● Your instruments and cables support the same connector interface and frequency range.
● Your PCB layout can accommodate the required launch and mounting geometry.
Never assume that all the connectors in the same family will perform identically and always check the specifications of the individual model.
Which PCB Layout and Substrate Factors Matter When Selecting a Solderless PCB Connector?
Connection quality is also an important factor of the PCB itself. The thickness of the board, dielectric characteristics, layout, and ground-plane design of copper all affect the signal propagation through the launch.
Before ordering, check the following:
● Substrate thickness and dielectric constant.
● Microstrip or grounded coplanar waveguide geometry.
● Signal-pad dimensions and ground clearances.
● Connector footprint and mechanical mounting requirements.
Avoidable design changes during testing can be avoided by matching these details with the recommendations of the manufacturer.
How Can You Minimise Signal Loss and Reflection with the Right Vertical Launch Connector?
The first step is to select a connector that is rated to operate at your frequency of operation and be careful with the PCB transition. Signal pads that are not matched, irregular grounding, and inappropriate launch dimensions can cause impedance discontinuities.
Where feasible, follow the recommended layout of the manufacturer and check the performance with proper measurements, which may include return loss and insertion loss.
What Should Engineers Check Before Installing a Solderless Connector on a High-Frequency PCB?
Verify the connector frequency rating, PCB compatibility, mounting procedure, and mating interface. Check contact alignment, mounting stability and any required torque or installation requirements, also.
Gwave Technology has available solderless vertical launch connector choices in high-frequency PCB applications. Browse its Solderless Vertical Launch Connector line to compare models and find a connector that fits your next RF test.