RF, Antennas & DAS/IBS
Low-PIM RF cable assemblies, feeder jumpers, AISG control cables, and coverage antenna systems for cellular networks.
Technical Architecture & Subproduct Scope
Semita Technologies supplies certified RF connectivity products for telecom macro sites, small cells, and in-building coverage systems. Engineered to deliver exceptional passive intermodulation (PIM) performance and low voltage standing wave ratio (VSWR) across 4G LTE, 5G Sub-6GHz, and CBRS bands.
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Our application engineering team designs custom connector configurations, core counts, and specialized armoring for telco operators.
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LMR 400 Jumper Cable
Semita LMR-400 flexible coaxial jumper cables are engineered for ultra-low-loss wireless antenna links, base station feeder connections, and cellular radio setups. Designed with a solid bare copper-clad aluminum conductor, foam polyethylene dielectric, and bonded aluminum tape plus 90% tinned copper braid shield, LMR-400 delivers low attenuation up to 6 GHz.
Key Engineering Features
- Drop-in replacement for RG-8 / 9913 air-dielectric type cables with superior flexibility
- Dual shielding (100% bonded aluminum foil + 90% tinned copper braid) gives >90 dB shielding effectiveness
- Solid Bare Copper-Clad Aluminum (BCCAI) core delivers low DC resistance
- UV-stabilized weather-tight black polyethylene jacket for outdoor durability
- Factory-terminated and tested with precision N-Type, SMA, or 4.3-10 connectors
Approved Applications & Deployments
Technical Performance Specifications
| Cable Type | LMR-400 Equivalent Low-Loss 50 Ohm Coaxial |
|---|---|
| Characteristic Impedance | 50 ± 2 Ohms |
| Operating Frequency | DC to 6.0 GHz |
| Center Conductor | Solid Bare Copper-Clad Aluminum (2.74 mm / 0.108 in) |
| Dielectric | Foam Polyethylene (7.24 mm / 0.285 in) |
| Shielding Coverage | Bonded Aluminum Foil + Tinned Copper Braid (90% coverage) |
| Attenuation @ 900 MHz | 6.8 dB / 100m (2.2 dB / 100ft) |
| Attenuation @ 2400 MHz | 14.1 dB / 100m (4.4 dB / 100ft) |
| Attenuation @ 5800 MHz | 22.2 dB / 100m (7.3 dB / 100ft) |
| Velocity of Propagation | 85% |
| Outer Jacket | UV-Resistant Black Polyethylene (Ø 10.29 mm) |
½" Superflex RF Jumper Cable
Semita 1/2-inch superflexible corrugated copper RF jumper cables provide the critical connection between cell tower Remote Radio Units (RRU) and macro antennas. Engineered with factory-soldered connectors, low VSWR, and guaranteed passive intermodulation (PIM ≤ -160 dBc), these assemblies withstand high wind vibration and continuous environmental exposure.
Key Engineering Features
- Guaranteed low passive intermodulation: PIM ≤ -160 dBc (@ 2x43 dBm tones)
- Helically corrugated copper outer conductor delivers tight bending flexibility without kinking
- Factory-injection molded weatherproofing boots eliminate manual taping on tower masts
- Available with 4.3-10, 7/16 DIN, and N-Type connector combinations
- 100% factory tested for Return Loss, Insertion Loss, and dynamic PIM
Approved Applications & Deployments
Technical Performance Specifications
| Cable Construction | 1/2" Superflexible Helical Corrugated Copper |
|---|---|
| Characteristic Impedance | 50 ± 1 Ohm |
| Frequency Range | 698 MHz to 3800 MHz (5G Sub-6 ready) |
| PIM Performance | PIM ≤ -160 dBc (@ 2 x 43 dBm carriers) |
| VSWR / Return Loss | VSWR ≤ 1.12 (Return Loss ≥ 25 dB) across 698–2700 MHz |
| Connector Formats | 4.3-10 Male/Female, 7/16 DIN Male, Type-N |
| Connector Plating | Tri-Metal (White Bronze) Plated Brass |
| Min. Bending Radius | 30 mm (Single Bend) / 50 mm (Repeated) |
| Ingress Protection | IP68 (Mated with factory overmolded boot) |
RF Power Splitters & Dividers
Semita RF cavity power splitters divide single RF inputs into 2, 3, or 4 equal antenna outputs with minimum insertion loss and superior passive intermodulation (PIM ≤ -160 dBc). Designed for in-building Distributed Antenna Systems (DAS) and cellular coverage networks, our reactive splitters handle up to 300 Watts of RF average power.
Key Engineering Features
- Ultra-wideband operating frequency: 698 to 4000 MHz (covering 2G, 3G, 4G, 5G, and CBRS)
- Low PIM construction rated ≤ -160 dBc prevents receiver desensitization
- High power rating up to 300W continuous average power handling
- Low insertion loss (typically ≤ 0.15 dB above theoretical division)
- IP65 weatherproof silver-plated aluminum cavity with 4.3-10 or N-Female ports
Approved Applications & Deployments
Technical Performance Specifications
| Model Series | SM-SPL-727 (698–2700 MHz) & SM-SPL-740 (698–4000 MHz) |
|---|---|
| Configurations Available | 2-Way, 3-Way, 4-Way |
| Split Loss | 3.0 dB (2-Way) | 4.8 dB (3-Way) | 6.0 dB (4-Way) |
| Insertion Loss | ≤ 0.20 dB (Above theoretical split) |
| PIM Rating | ≤ -160 dBc (@ 2 x 43 dBm test tones) |
| Impedance | 50 Ohms |
| Average Power Handling | 300 Watts Max |
| Port Connectors | N-Female or 4.3-10 Female |
| Environmental Rating | IP65 Outdoor / Indoor Weatherproof |
| Operating Temperature | -35°C to +75°C |
GPS & GLONASS Timing Antenna
The Semita SM-GPST120 is an active high-gain GPS/GLONASS timing antenna engineered for precise clock synchronization in LTE and 5G NR TDD telecommunication networks. Equipped with an internal dual-stage low noise amplifier (LNA) delivering 40 dB gain and sharp out-of-band rejection filters, it guarantees steady satellite tracking in noisy RF environments.
Key Engineering Features
- Built-in dual-stage LNA provides 40 ± 3 dB gain for long feeder runs up to 100m
- High out-of-band rejection filters prevent cellular transmitter desensitization
- Dual-constellation support: GPS L1 (1575.42 MHz) and GLONASS L1 (1602 MHz)
- Rugged UV-resistant hermetically sealed polycarbonate radome (IP67)
- Integrated lightning protection and ESD surge suppression
Approved Applications & Deployments
Technical Performance Specifications
| Frequency Range | 1560 MHz to 1610 MHz (GPS L1 & GLONASS L1) |
|---|---|
| LNA Gain | 40 ± 3 dB typical |
| Noise Figure | ≤ 2.0 dB |
| Out-of-Band Rejection | ≥ 50 dBc (@ ± 50 MHz from passband) |
| Output VSWR | ≤ 1.5 : 1 |
| Output Impedance | 50 Ohms |
| Supply Voltage | 3.0V to 5.5V DC (Feed via coaxial center conductor) |
| Operating Current | ≤ 25 mA |
| Connector | N-Type Female |
| Ingress Protection | IP67 Weatherproof Sealed Radome |
IBS & DAS Coverage Antennas
Semita low-profile wideband indoor antennas are designed for high-density Distributed Antenna Systems (DAS) and in-building cellular coverage in shopping malls, airports, and corporate towers. Available in 360° omni-directional ceiling mounts and directional wall panel mounts, they ensure uniform wireless signal distribution across 698–3800 MHz.
Key Engineering Features
- Ultra-wideband frequency coverage: 698–960 MHz, 1710–2700 MHz, and 3300–3800 MHz (5G)
- Low-profile aesthetic ceiling flush mount blends unobtrusively into architectural spaces
- Low passive intermodulation (PIM ≤ -153 dBc) eliminates noise floor elevation
- Available in Omni-Directional (3-5 dBi) and Directional Panel (7-9 dBi) configurations
- Constructed with flame-retardant UL94-V0 rated ABS radome
Approved Applications & Deployments
Technical Performance Specifications
| Frequency Band | 698–960 MHz / 1710–2700 MHz / 3300–3800 MHz |
|---|---|
| Antenna Type | Omni-Directional Ceiling Mount / Directional Wall Panel |
| Gain | 3 to 5 dBi (Omni) | 7 to 9 dBi (Panel) |
| VSWR | ≤ 1.5 across all bands |
| Polarization | Vertical Linear |
| PIM Performance | PIM ≤ -153 dBc (@ 2 x 43 dBm) |
| Horizontal Beamwidth | 360° (Omni) | 65°–85° (Panel) |
| Connector | N-Female or 4.3-10 Female with 30cm low-PIM pigtail |
| Radome Material | High-Impact Flame Retardant ABS (UL94-V0) |
CPRI FTTA Fiber Jumper Cables
Semita CPRI (Common Public Radio Interface) fiber optic jumper cables provide the high-speed optical connection between baseband units (BBU) and tower-mounted Remote Radio Units (RRU). Featuring bend-insensitive singlemode fiber protected by stainless steel armored micro-tubing and IP67 weather-tight FullAXS, ODVA, or PDLC connector boots, they withstand harsh outdoor mast conditions.
Key Engineering Features
- Stainless steel micro-spiral armoring protects optical fibers from bird pecks and crushing
- IP67 waterproof connector hood (FullAXS, ODVA, PDLC, or NSN compatible)
- Corning G.657.A2 bend-insensitive optical cores eliminate macro-bend loss on masts
- Heavy-duty UV-resistant and flame-retardant TPU outer jacket
- Factory-installed pulling eye allows easy vertical hoisting up tower legs
Approved Applications & Deployments
Technical Performance Specifications
| Fiber Cores | 2 Cores (Duplex Singlemode ITU-T G.657.A2) |
|---|---|
| Connectors | Duplex LC to IP67 FullAXS / ODVA / PDLC Shroud |
| Insertion Loss | Typical ≤ 0.20 dB (Max 0.30 dB) |
| Return Loss | UPC ≥ 50 dB | APC ≥ 60 dB |
| Internal Armoring | Flexible Stainless Steel Spiral Tape |
| Outer Sheath | Heavy-Duty Black Flame-Retardant TPU (Ø 5.0 mm / 7.0 mm) |
| Pulling Tension | 400 N Installation Tensile Strength |
| Crush Resistance | 2,000 N / 100 mm |
| Ingress Protection | IP67 Water and Dust Ingress |
| Temperature Rating | -40°C to +85°C |
AISG RET Control Cable Assemblies
Semita AISG RET (Remote Electrical Tilt) control cables provide DC power and command telemetry between base station controllers and tower-top antenna tilt motors. Manufactured strictly to AISG 2.0 and 3GPP standards, these multi-conductor shielded cables feature IP67 circular 8-pin DIN connectors and heavy polyurethane sheaths.
Key Engineering Features
- Standardized 8-Pin circular DIN connectors (IEC 60130-9 compliant)
- Full compliance with AISG 1.1, AISG 2.0, and 3GPP specifications
- Double shielded with aluminum foil and tinned copper braid for zero EMI into RF lines
- Flame-retardant, halogen-free, and oil-resistant black polyurethane (PUR) jacket
- Factory overmolded IP67 environmental seals on male and female connectors
Approved Applications & Deployments
Technical Performance Specifications
| Standard Compliance | AISG 2.0 / 3GPP / IEC 60130-9 |
|---|---|
| Connectors | 8-Pin Circular DIN Male to 8-Pin Circular DIN Female |
| Conductors | 1 Pair 24 AWG Twisted (RS485 Telemetry) + 2 Cores 18 AWG (DC Power) |
| Voltage Rating | 300 V |
| Current Rating | 5.0 A Continuous |
| Shielding | Aluminum Foil Tape + 85% Tinned Copper Braid |
| Outer Jacket | UV-Resistant Flame-Retardant Polyurethane (PUR) |
| Ingress Protection | IP67 Mated Condition |
| Operating Temperature | -40°C to +80°C |
Deploy High-Reliability RF, Antennas & DAS/IBS with Semita
Whether you require customized cable constructions, high-precision optical attenuation tolerances, or fast-track batch delivery across India and global hubs, our engineers are ready to assist.