SV Microwave, a leader in the RF and Microwave industry that offers RF/Microwave coaxial connectors, cable assemblies and passive components designed for military, IoT, 5G, satellite, high speed, aerospace, commercial and telecommunications applications has designed a new product line of high-frequency, low pass filters engineered to support DC to 12 and DC to 18 GHz passbands.
These low pass filters are offered with both SMA and SMPM connectors, giving system designers the flexibility to choose between ruggedness and extreme miniaturization. These new filters achieve a smaller form factor without compromising performance. In particular, the SMPM filter variant maintains the same outer diameter as a standard SMPM bullet, preserving connector density in space-constrained designs.
The SMA-based low pass filters are optimized for durability and reliable RF performance. With an impedance of 50 ohms and frequency coverage up to 18 GHz, with select models extending to 26.5 GHz, these filters are designed for systems that require robust shielding and mechanical stability. They provide a shielding effectiveness of at least -90 dB and can withstand dielectric voltages of up to 1000 VRMS. The filters are tested for 500 mating cycles, and proper performance is maintained with a mating torque of 7 to 10 in-lbs. The SMA filters are also inter-mateable with 2.92 mm connectors, which extends their application flexibility. They are rated for operation across a wide temperature range of -65 °C to +165 °C. Furthermore, they comply with multiple environmental standards under MIL-STD-202 testing, including corrosion (salt spray),vibration, shock, thermal shock, moisture resistance, and barometric pressure testing at altitudes up to 70,000 feet.
The SMPM-based low pass filters also maintain a 50-ohm impedance and deliver reliable frequency coverage up to an impressive 65 GHz. They provide shielding effectiveness of at least -80 dB from DC to 3 GHz and at least -65 dB from 3 to 26.5 GHz, ensuring high signal integrity even in challenging environments. Their dielectric withstanding voltage is 325 VRMS. The SMPM filters are offered in two configurations: Spring Bullet (SB), which supports up to 500 mating cycles, and Full Detent (FD), which supports up to 100 mating cycles. The insertion force is 2.5 lbs for SB and 4.5 lbs for FD, while the withdrawal force is 1.5 lbs for SB and 6.5 lbs for FD. Mechanical tolerances are tightly controlled, with axial misalignment capped at 0.010 inches maximum and radial misalignment at 3 degrees maximum. Like their SMA counterparts, the SMPM filters are rated for -65 °C to +165 °C operation and meet the same MIL-STD-202 standards.
These SMA and SMPM low pass filters are engineered to remove interference from nearby signals, ensuring cleaner system performance. The design achieves low insertion loss within the passband, preserving system efficiency while blocking unwanted higher-frequency energy. The SMPM variant incorporates a push-on interface for ease of integration, while both series feature a compact form factor compared to traditional RF filters.
The versatility of these filters makes them suitable for a broad range of mission-critical applications. They are particularly well-suited for RADAR systems, where interference suppression and high-frequency performance are essential. They are also ideal for satellite communications, providing signal clarity in space-based platforms. In addition, these filters are used in signals intelligence (SIGINT) systems where wideband, low-noise filtering is required. Finally, their small size and compatibility with push-on interconnects make them an excellent fit for board-to-board solutions in compact, high-density designs.
SV Microwave’s low pass filters with SMA and SMPM options represents a significant advancement in compact, high-performance filtering solutions. With wide frequency coverage extending up to 65 GHz, outstanding shielding effectiveness, low insertion loss, and rigorous environmental compliance, these filters are purpose-built for the next generation of RF, defense, aerospace, and high-speed commercial systems.