For modern embedded systems, modularity is no longer an option, but a mandatory one. The constantly soaring signal bandwidth and increasing system complexity require a design framework that is flexible, reliable, and scalable. The VPX system can meet this basic requirement, and in this architecture, the VITA 67.3 standard specifies blind plug-in coaxial RF connections, thereby achieving simple and compact high-performance RF integration in modular design.
VPX is based on the VITA 46 standard and is a robust and durable system architecture. Designers can insert functional modules such as processors, FPGAs, and RF front-end into a shared backplane. The VITA 67.3 standard extends this architecture by defining blind coaxial RF connectors that automatically engage when the module is inserted into the backplane.
This way, seamless and high-density signal routing can be achieved through the backplane without the need for external wiring or manual RF connections. This means fewer cables are used, clearer layout, and system scalability. This system is easier to build and maintain, and also easier to evolve and optimize. This standard is key to creating smaller, lighter, more cost-effective applications without sacrificing functionality.
For product designers, VITA 67.3 can simplify the integration of high-frequency RF and complex embedded systems without affecting modularity or signal integrity. VITA 67.3 is designed to work in conjunction with VITA 46 (digital signal) and VITA 66.5 (optical signal), enabling the integration of RF, digital, and optical fields into a compact VPX system.
This feature can reduce design complexity, accelerate development, and support field upgradable applications. This feature also provides a reliable way to build applications that comply with the Sensor Open Systems Architecture (SOSA) program supported by the US Department of Defense (DoD). This plan defines modular and interoperable hardware standards for embedded systems, particularly those used for defense, aerospace, and intelligence applications.
Amphenol SV Microwave is SOSA ™ An active member of the Electromechanical Hardware Group, offering a full range of VPX/VITA solutions, including three levels of connectors for VPX systems that comply with the VITA 67.3 standard, each optimized for different density, frequency, and space requirements. The company provides users with complete solutions, including cable components, adapters, backplates, and plug-in contacts, as well as installation and removal tools.
It has been proven that Ampheno's VITA 67.3 SMPM and SMPS product lines (Figure 1) are a reliable solution for designers who need to build VPX systems with RF functionality.
Figure 1: SMPS connector module (left), displayed side by side with two SMPM options. (Image source: Amphenol SV Microwave)
For systems that require stable RF performance but do not require extremely high frequencies or densities, the SMPM series miniature push in connectors are a reliable choice. The standard design version of this series supports frequencies from DC to 26.5 GHz, while the extended range design version can support frequencies up to 65 GHz. This series is typically used for applications such as radar control modules and secure communication devices. The compact appearance and blind insertion function make this series not only easy to install and maintain, but also able to meet the mechanical requirements for on-site use.
The SMPS series has a smaller appearance and can be used for high-density RF modules with limited space but very high signal performance requirements. This series can support frequencies up to 65 GHz, achieving more powerful functionality in a smaller size while maintaining signal integrity or reliability, which is exactly what many modern electronic warfare, electronic intelligence (ELINT), and compact phased array radar systems require.
Ultra compact NanoRF
Amphenol Microwave SV also provides an ultra compact solution - NanoRF - for high channel VPX modules. This series is designed for higher densities and frequencies (up to 70 GHz), suitable for applications where space and weight are the primary considerations. For example, the 23.98 mm x 13.92 mm 9351-80004 hybrid RF and fiber port module (left in Figure 2) is installed on a VPX payload card (such as an RF board or sensor input card) and used in conjunction with the 9341-80005 backplane housing module (right in Figure 2) to form a blind plug interconnect system that complies with VITA 67.3 standards, reducing wiring and saving board space.