Compact RF systems need small parts that still perform well at high frequencies. GPPO and G3PO interconnects save board space, while a DC block and a load protect and stabilize the signal path. Flexi RF Inc supplies all of these for test benches, board-to-board links, and millimeter-wave work.
This guide explains what each part does, how they work together, and how to choose the right one.
What Is a GPPO Connector?
GPPO, also known as Mini-SMP, is a miniature coaxial RF connector type made for compact high frequency systems. It suits places where larger connectors do not fit. It joins cables and printed circuit boards, and it comes in several mounting styles.
Flexi RF Inc lists these parts in its range. Examples include a male full detent surface mount PCB type rated DC to 40 GHz and an end launch type with a 5.6mm length. A hermetically sealed glass dielectric version reaches DC to 65 GHz.
What Is a G3PO Adapter?
G3PO, also called SMPS, is a miniature RF interface. An adapter in this family joins a G3PO port to another G3PO port, or to a different interface such as 1.0mm, 1.85mm or 2.92mm. It is a good fit for compact boards and millimeter-wave test work.
According to Flexi RF Inc, G3PO parts are about 45% smaller than standard SMP designs and 30% smaller than MicroSMP parts. The collection has 17 models. Their frequency ratings run from DC to 40 GHz up to DC to 100 GHz.
Why Small RF Interconnects Matter
Smaller parts save space, but they still need to perform well. G3PO designs suit board-to-board and blind-mate use, and they use a snap-on mating mechanism. The adapters use gold-plated beryllium-copper contacts. These help keep VSWR and insertion loss low over thousands of mating cycles.
Can GPPO and G3PO Parts Work Together?
Yes. Flexi RF Inc offers GPPO to G3PO adapters, so both families can share one signal path. One example is a GPPO (Mini-SMP) female to G3PO (SMPS) female straight adapter rated DC to 67 GHz. This helps when a system uses different compact interfaces on separate boards.
What Is a 1.85mm DC Block?
This coaxial part stops direct current while letting radio frequency signals pass. It protects sensitive equipment from unwanted DC voltage in a signal path. The version from Flexi RF Inc joins a 1.85mm male port to a 1.85mm female port and works from 10 MHz to 67 GHz.
The blocks DC on the inner conductor. Its key details are:
- VSWR below 1.50
- Insertion loss of 0.9 dB or less
- Maximum input power of 2 watts
- 50 ohm impedance
- Passivated stainless steel body
- At least 500 mating cycles
- Operating range of -55 ºC to +85 ºC
- RoHS compliant
It is listed at $359.90 USD.
What Is a 1.85mm Load?
This part is a termination that absorbs RF energy at the end of a line, so the signal does not reflect back. It is placed on an unused port to keep a system stable. The version from Flexi RF Inc has a female connector and covers DC to 67 GHz at 0.5 watts.
This has a passivated stainless steel body. Its main details are:
- VSWR of 1.45
- 50 ohm impedance
- Maximum input power of 0.5 watts
- At least 500 mating cycles
- Operating range of -55 ºC to +125 ºC
- RoHS compliant
It is listed at $280.00 USD.
How Do These Parts Fit Together in One Setup?
The G3PO collection includes 1.85mm to G3PO adapters rated up to 67 GHz. This lets a DC block or a load sit in the same signal path as G3PO parts, without a drop in frequency rating.
A simple test chain shows how it works. A G3PO adapter reaches a 1.85mm port. A DC block then protects the instrument, and a load terminates any port left unused.
How to Choose the Right Part
A few checks make the choice easier:
- Frequency range: Match the rating to your highest test frequency. The listed G3PO adapters reach DC to 40 GHz for 2.92mm, DC to 67 GHz for 1.85mm, and DC to 100 GHz for 1.0mm.
- Interface and gender: Check the port on your gear, then pick the matching male or female end.
- Mounting style: For connectors, choose between options such as surface mount and end launch to suit your board.
- Power rating: Keep input power below the limit. The load handles 0.5 watts, and the DC block handles 2 watts.
- Availability: Check stock on the product page before you plan a build.
Handling Tips
Small connectors need gentle care. Keep the mating faces clean. Line up the parts straight before you push them together. Avoid side loads on the cable. Place the DC block on the side that needs protection from DC voltage, and terminate unused ports to reduce reflections.
Why Buy From Flexi RF Inc
Flexi RF Inc carries 226 connectors and a wide range of adapters, cable assemblies, attenuators and amplifiers. Prices are listed in USD. The site also notes same day shipping and online technical support, so you can ask questions before you order.
Final Thoughts
GPPO and G3PO parts keep compact RF systems organized, and a DC block and a load protect the signal chain up to 67 GHz. Check the frequency range, interface, and power rating first. Then browse Flexi RF Inc to find the parts that fit your design.
