Modern military and aerospace platforms are undergoing a fundamental transformation. Phased array radar systems are growing in complexity, electronic warfare capabilities are expanding, satellite communications are operating at higher frequencies, and modular open architectures are becoming the standard for future development.
As these systems evolve, one challenge continues to emerge across virtually every platform: how to deliver more RF capability in less space without compromising performance, reliability, or maintainability.
For engineers who have relied on SMA and SMP interconnects for decades, the question is no longer whether higher-density solutions are needed. The question is how to increase density, frequency performance, and scalability while maintaining the robustness required for mission-critical environments.
The answer lies in the next generation of RF interconnect technologies, including SMP, SMPM, SMPS, and ultimately CoreHC-compliant 2.5 mm architectures designed to meet the demands of tomorrow's defense systems.
The Growing Limitations of Legacy RF Interconnects
For years, SMA connectors have been the workhorse of military RF systems. Their durability, electrical performance, and proven reliability made them the preferred choice for countless radar, communications, electronic warfare, and test applications.
SMP connectors introduced the next phase of evolution, bringing blind-mate capability and more compact packaging that enabled increasingly modular system designs.
While both technologies continue to serve important roles, modern defense architectures are pushing them toward their practical limits.
SMA Challenges
- Larger footprint limits maximum channel density
- Threaded coupling increases assembly time and maintenance complexity
- Not optimized for blind-mate modular architectures
- Consumes valuable board and panel space in high-channel-count systems
SMP Challenges
- Improved density compared to SMA, but increasingly constrained in ultra-dense applications
- Channel spacing limitations can restrict next-generation phased array designs
- Growing pressure from higher-frequency and broader-bandwidth requirements
- Packaging efficiency challenges in advanced RF front-end architectures
For programs focused on reducing Size, Weight, and Power (SWaP), these constraints directly impact system scalability, performance, and future upgradeability.
A Scalable Migration Path to Higher-Density RF Architectures
The transition to next-generation RF interconnects does not have to require a disruptive redesign. Instead, defense engineers can leverage a natural progression of technologies that gradually increases density and performance while preserving familiar design approaches.
Step 1: SMP – The Proven Foundation for Modular RF Design
For organizations transitioning from SMA-based systems, SMP remains a highly effective starting point.
Key advantages include:
- Blind-mate engagement for faster assembly and serviceability
- High-frequency performance up to 40 GHz
- Greater packaging flexibility compared to SMA
- Mechanical tolerance that supports ruggedized defense modules
SMP has become a trusted solution for modular RF systems and continues to provide an excellent balance of performance and reliability.
However, as channel counts continue to increase, many next-generation programs require even greater density.
Step 2: SMPM – Higher Density for Advanced RF Systems
SMPM provides a natural evolution beyond SMP for designers seeking more channels within the same footprint.
Benefits include:
- Smaller interface size for tighter connector spacing
- Frequency performance up to 65 GHz
- Reduced package size without sacrificing signal integrity
- Ideal for densely populated RF modules and high-performance backplanes
For phased array radar systems, electronic warfare platforms, and advanced communications equipment, SMPM enables meaningful density improvements while supporting increasingly demanding electrical requirements.
Step 3: SMPS – Maximum Miniaturization
As platform constraints become even more severe, SMPS pushes RF interconnect density to the next level.
Key features include:
- Ultra-compact footprint
- Exceptional packaging efficiency
- Support for extremely high channel counts
- Optimized for miniaturized RF front ends
SMPS is particularly valuable in applications where every cubic millimeter matters, including:
- Unmanned systems
- Space-based payloads
- Portable electronic warfare equipment
- Advanced ISR platforms
For many designers, SMPS represents the practical limit of connector miniaturization within conventional RF architectures.
But the industry's future is no longer defined solely by connector size.
It is increasingly defined by standardized high-density ecosystems.
The Next Evolution: CoreHC-Compliant 2.5 mm Architectures
As modern defense systems become more interconnected and modular, interoperability and standardization are becoming just as important as size and frequency performance.
This shift is driving increased adoption of CoreHC-compliant 2.5 mm center-to-center solutions.
Unlike traditional approaches that focus primarily on reducing connector dimensions, CoreHC addresses the broader system architecture challenge by creating a standardized framework for ultra-high-density RF interconnect deployment.
The result is a solution that enables higher channel counts, simplified integration, and improved scalability across complex defense platforms.
Why Defense Designers Are Moving to 2.5 mm Spacing
Compared to legacy SMA layouts and even conventional SMP implementations, 2.5 mm center-to-center architectures offer significant system-level advantages.
Increased RF Density
Higher packing density enables more RF channels within the same physical footprint, supporting increasingly complex phased arrays and multi-function systems.
Reduced SWaP
Smaller, denser interconnect architectures help reduce module size, system weight, and overall packaging requirements.
Enhanced Scalability
As systems evolve and channel counts grow, standardized high-density layouts provide a more scalable foundation for future development.
Improved Platform Efficiency
Higher interconnect density allows designers to allocate valuable space to mission-critical electronics rather than connector hardware.
For airborne, naval, ground, and space-based platforms, these advantages translate directly into greater capability and design flexibility.
Flexible Integration for Modern Defense Architectures
A key advantage of the CoreHC 2.5 mm ecosystem is its flexibility across multiple integration approaches.
Cable-to-PCB Solutions
High-density cable-to-board interfaces enable efficient routing of RF signals from external cable assemblies into tightly packed electronic subsystems.
These solutions are particularly well suited for:
- Modular subsystem integration
- Field-replaceable units
- High-channel-count I/O architectures
- Mission equipment upgrades
PCB-to-PCB Array Solutions
For ultra-dense internal architectures, PCB-to-PCB block arrays provide highly efficient blind-mate connectivity between stacked boards and RF modules.
Applications include:
- Phased array radar assemblies
- Electronic warfare subsystems
- Multi-board RF modules
- Mezzanine-style architectures
This combination allows engineers to deploy a consistent high-density strategy throughout the entire system, from external interfaces to internal board-level interconnects.
Engineered for Mission-Critical Defense Environments
Density alone is meaningless if reliability is compromised.
That is why advanced RF interconnects must deliver both performance and survivability.
Our solutions are designed to support the demanding environmental requirements commonly encountered in defense applications through:
- Blind-mate functionality for modular maintenance and field service
- Robust mechanical construction resistant to shock and vibration
- Precision alignment for repeatable RF performance
- Excellent signal integrity at high frequencies
- Low crosstalk in densely packed architectures
- Reliable operation through thermal cycling and harsh environmental conditions
Whether deployed in ground vehicles, naval systems, airborne platforms, or aerospace applications, these designs are built to support mission success.
Enabling the Future of Defense RF Systems
Defense platforms are moving toward:
- Larger phased arrays with greater element counts
- Digital beamforming architectures
- Multi-function RF systems integrating radar, communications, and electronic warfare
- Higher-frequency operation and wider bandwidths
- Modular Open Systems Architecture (MOSA) initiatives
- Rapid technology insertion and upgrade programs
Meeting these requirements demands more than incremental connector improvements.
SMP, SMPM, and SMPS each represent important milestones in the evolution of high-density RF connectivity. They provide practical solutions for increasing density, improving performance, and supporting increasingly compact designs.
However, as defense programs look toward the next decade of development, many are beginning to focus on a larger objective: establishing a standardized high-density architecture that can continue evolving as mission requirements change.
This is where CoreHC-compliant 2.5 mm solutions represent a fundamental advancement.
Rather than simply offering another incremental density improvement, CoreHC provides a framework for building scalable, interoperable, and future-ready RF systems. It combines the density demanded by advanced defense applications with the precision alignment, blind-mate functionality, and architectural flexibility required for long-term platform growth.
From Legacy Interconnects to Future-Ready Architectures
For decades, SMA and SMP connectors helped define the foundation of military RF systems.
Today, defense designers face a new reality.
- More channels.
- Higher frequencies.
- Greater bandwidth.
- Smaller footprints.
- Faster integration cycles.
To meet these demands, interconnect technology must evolve from individual connector solutions toward comprehensive high-density architectures.
While SMP, SMPM, and SMPS each play important roles in that transition, CoreHC-compliant 2.5 mm solutions represent the logical destination for organizations seeking maximum density, long-term scalability, and alignment with future defense architectures.
The benefits extend beyond connector performance:
- Increased channel density without expanding platform size
- Reduced weight and packaging constraints
- Enhanced support for high-frequency operation
- Faster integration through blind-mate connectivity
- Improved scalability for future upgrades
- Simplified adoption of modular and open-system architectures
- Greater long-term design flexibility
Ultimately, the value of CoreHC is not that it replaces existing RF interconnect technologies.
The value is that it builds upon everything those technologies have made possible while providing a path forward for the next generation of defense systems.
Ready to Design Beyond the Limits of Traditional RF Interconnects?
Whether you're modernizing an existing platform, developing an advanced phased array, or architecting a next-generation electronic warfare system, the right interconnect strategy can have a lasting impact on system performance, scalability, and mission success.
Our portfolio spans the full evolution of high-density RF connectivity, from proven SMP solutions to advanced SMPM and SMPS technologies. But for defense programs focused on maximizing channel density, minimizing SWaP, and preparing for future growth, CoreHC-compliant 2.5 mm architectures provide the clearest path forward.
As demanding RF systems continue to evolve, the industry's direction is becoming increasingly clear: higher density, greater modularity, and standardized architectures that support long-term innovation.
CoreHC is engineered to help you get there.