Sinclair Technologies specializes in innovative wireless communication solutions trusted across the industry. Our portfolio includes over 3,000 products, from advanced antennas and filters to a wide range of accessories, covering key frequency bands such as 800 MHz, UHF, VHF, TETRA, and 5G. We also offer customized solutions, including Low PIM antennas and PIM-hardened filters, to ensure high-reliability performance in demanding environments. Discover how Sinclair can elevate your wireless systems—contact us today to learn more.

NEW PRODUCT ALERTS

ST221 Wideband Series

ST221 Wideband Series is a rugged, low-profile VHF antenna designed for transportation and mobile communications. Built on Sinclair’s proven cast aluminum platform, it delivers reliable omnidirectional coverage, broad VHF frequency support, and up to 300 W power handling. Its compact design, durable construction, and DC-grounded architecture make it an ideal choice for rail, transit, public safety, and fleet applications operating in demanding environments.

Low-profile 4 in (102 mm) design minimizes impact risk on roof-mounted vehicles.
Wideband, dual-resonance performance supports broad VHF coverage and specialized channel plans.
Rugged cast aluminum construction ensures long-term durability in harsh environments.
Omnidirectional, vertically polarized pattern provides reliable mobile VHF coverage.
DC-grounded, 300 W power handling for demanding VHF applications.
Ideal for rail, transit, public safety, and commercial fleet vehicles.

SM701 Compact Mobile Antenna

The SM701 Series is a compact, low-profile antenna platform that combines cellular, GPS/GNSS, and Wi-Fi connectivity into a single rugged solution. Designed for fleet, transit, utility, industrial, and in-building applications, it simplifies installation, reduces rooftop clutter, and delivers reliable performance in space-constrained environments. With support for wideband cellular coverage, durable IP67-rated construction, and flexible mounting on metallic or non-metallic surfaces, the SM701 Series is built for dependable connectivity in harsh conditions.

Flexible Configurations: available in cellular-only, cellular + GPS, and GNSS + dual-band Wi-Fi configurations.
Broad Multi-band Coverage: supports cellular bands across 694–960, 1710–2700, 3400–4200, 4400–5000, and 5150–6000 MHz, depending on model.
Low-profile, Rugged Design: UV-stabilized housing designed for demanding mobile and transport applications.
Simple, Sealed Mounting: installs through a single 3/4 in mounting hole and provides IP67 protection after proper installation.

Q3 FEATURED PRODUCTS

SD210R-SF2 Series

The SD210R-SF2 Series is a rugged family of directional VHF antennas covering 138–174 MHz. Available in 60°, 90°, and 120° beamwidth options, it delivers 4.5–7 dBd gain, broadband performance, and low PIM for reliable operation in simulcast, sectorized, and other demanding outdoor RF applications. Designed for side-mount installations only.

60°, 90°, and 120° horizontal beamwidth options for VHF simulcast and sector coverage.
Single-bay dipole reflector antennas with 4.5-7 dBd of gain.
Broadband 138–174 MHz operation for full-band VHF applications.
Low PIM design, rated ≤ -150 dBc.
Rugged side-mount construction for outdoor installations.

ST321 Series

The Sinclair ST321 Series UHF/TETRA transit antennas are compact, low-profile omnidirectional antennas designed as rugged alternatives to conventional quarter wave whips. Built with a high-strength cast aluminum body for long service life, the ST321 Series is well suited for trains, public-transit vehicles, construction equipment, police vehicles, and other fixed or mobile applications where low clearance and durability are important. Each antenna is supplied with mounting hardware to support a weather-resistant installation. A minimum 30" x 30" ground plane is required.

Compact, low-profile design ideal for low-clearance mobile and transit applications.
Rugged cast aluminum construction delivers exceptional durability and long service life.
Reliable omnidirectional UHF/TETRA performance for trains, public transit, public safety, and fleet vehicles.

SP42-HL Series

The Radiant™ SP42F2X-HL is Sinclair's next-generation panel antenna, delivering exceptional wideband performance, flexible beam configurations, and industry-leading -150 dBc PIM for low-noise 4G and trunking systems. Built with a rugged fiberglass radome and fully DC-grounded components for superior lightning protection, it is engineered for reliable operation in public safety, telecommunications, and utility applications. An integrated hot-swappable Remote Control Unit (RCU) enables Remote Electrical Tilt (RET), while its compact design provides excellent gain, beam control, isolation, and sidelobe suppression across the entire operating band.

High-gain dual-port cross-polarized panel antenna with stable pattern.
Patent-pending design for outstanding electrical performance and compact form factor.
Integrated internal remote electrical tilt (RET).
Rugged design with fiberglass radome for harsh environment.