

Overview
This high-gain VHF Yagi antenna is designed for reliable outdoor communication in the 154–157 MHz range, delivering 8 dBi directional gain to focus signal coverage where it is needed most. With vertical polarization, low VSWR, 100 W power handling, an N Female connector, DC-ground lightning protection, and a rugged outdoor design rated for wind speeds up to 210 km/h, it is a practical solution for fixed VHF communication systems that require strong, stable, and focused coverage.
High-Gain VHF 154–157 MHz Outdoor Directional Yagi AntennaEngineered for professional VHF communication systems that demand focused coverage, dependable outdoor performance, and efficient RF transmission, this industry-leading VHF Yagi antenna provides a powerful combination of 154–157 MHz frequency coverage, 8 dBi directional gain, vertical polarization, controlled beamwidth, and rugged mechanical construction.
Designed specifically for fixed directional VHF applications, the antenna concentrates RF energy toward the required coverage area rather than distributing energy equally in every direction. This makes it an excellent solution for communication networks where stronger forward coverage, improved signal stability, and better control of the radiation pattern are more important than wide omnidirectional coverage.
With an 8 dBi gain, VSWR of ≤1.8, 50-ohm impedance, 100 W maximum input power, and precisely controlled horizontal and vertical beamwidth, this best-in-class outdoor directional antenna is built for professional radio communication installations.
Its robust mechanical design includes DC-ground lightning protection, an N Female connector, 40 cm LMR200 coaxial cable, an ABS antenna cover, wide operating temperature capability, and wind resistance up to 210 km/h. These features make it a highly practical solution for demanding outdoor VHF installations.
Optimized for 154–157 MHz VHF CommunicationThe antenna operates across the dedicated 154–157 MHz VHF frequency range. Rather than using an extremely broad operating bandwidth, the design focuses performance within this specified frequency window.
For customers building or upgrading systems operating between 154 MHz and 157 MHz, this dedicated frequency design provides a professional solution for fixed VHF communication applications.
The antenna can be used where the installation requires:
VHF 154–157 MHz operation
Directional RF coverage
8 dBi gain
Vertical polarization
Fixed outdoor installation
Controlled horizontal and vertical beamwidth
N Female connectivity
50-ohm RF systems
Up to 100 W RF power
Pole-mounted installation
8 dBi Directional Gain for Focused CoverageOne of the most important advantages of this VHF Yagi antenna is its 8 dBi directional gain.
Unlike an omnidirectional antenna that distributes RF energy around the installation location, a directional Yagi antenna concentrates more of the available RF energy toward a selected direction. This can make the RF system more effective when communication is required primarily toward a known coverage area.
The 8 dBi gain can help customers improve directional signal strength without immediately increasing transmitter power.
This makes the antenna particularly useful for fixed communication systems where antenna orientation can be planned during installation.
How Directional Gain Helps the CustomerThe directional radiation pattern can help address common VHF system challenges such as:
Weak signals toward a remote coverage area
Insufficient forward coverage
Poor efficiency from omnidirectional installations
Unnecessary RF energy transmitted in unwanted directions
Difficulty maintaining a focused communication path
Limited communication performance in fixed directional installations
By concentrating RF energy toward the intended direction, the antenna can provide a more controlled and efficient RF solution.
Controlled Horizontal and Vertical BeamwidthDirectional gain is most valuable when the antenna also provides predictable beamwidth characteristics.
This antenna provides:
Parameter
Specification
Horizontal Beamwidth
75° ±5°
Vertical Beamwidth
55° ±5°
The approximately 75-degree horizontal beamwidth provides focused directional coverage while still covering a practical horizontal sector.
The approximately 55-degree vertical beamwidth further concentrates RF energy in the elevation plane.
Together, these characteristics make the antenna suitable for installations where customers need more controlled RF coverage compared with a conventional omnidirectional antenna.
Horizontal CoverageThe 75° ±5° horizontal half-power angle allows RF energy to be focused toward a defined horizontal coverage area.
This can be useful when the desired receiving stations, radio users, or communication area are located primarily in one direction from the antenna installation point.
Vertical CoverageThe 55° ±5° vertical half-power angle provides additional control of the antenna's vertical radiation pattern.
This helps maintain directional RF energy rather than spreading excessive energy outside the intended coverage region.
Vertical Polarization for Professional VHF SystemsThe antenna uses vertical polarization.
Vertical polarization is commonly used in many professional VHF radio installations where transmitting and receiving antennas are vertically polarized.
Correct polarization alignment is important because polarization mismatch between antennas can cause additional signal loss.
For customers operating vertically polarized VHF systems, this antenna provides a straightforward solution that can be integrated into compatible existing installations.
Efficient RF Performance with VSWR ≤1.8Efficient RF power transfer between the radio system, feeder cable, and antenna is essential for reliable communication performance.
The antenna has a specified VSWR of ≤1.8 across its designed 154–157 MHz operating range.
Lower VSWR helps reduce reflected RF energy and allows more of the transmitter's available power to be delivered to the antenna.
For system integrators and RF engineers, this provides an important performance parameter when designing or maintaining professional VHF communication systems.
The antenna also uses a standard 50-ohm impedance, allowing integration into common professional RF systems.
Up to 100 W Power HandlingThe antenna supports a maximum input power of 100 W.
This power-handling capability makes the product suitable for professional VHF installations that require more than low-power handheld or compact antenna solutions.
The combination of 100 W power handling and 8 dBi directional gain provides system designers with a capable platform for fixed outdoor VHF installations.
Rather than relying only on higher transmitter output, customers can use directional antenna gain to improve the effectiveness of the overall RF system.
Professional Outdoor Directional DesignThis antenna is designed as an outdoor directional Yagi antenna.
The Yagi structure provides a practical combination of directional gain, controlled beamwidth, and outdoor mounting capability.
For customers who know where the required coverage area is located, a directional antenna can offer significant advantages compared with an omnidirectional design.
Typical installation environments can include:
Fixed VHF communication sites
Outdoor radio installations
Pole-mounted communication systems
Directional VHF coverage points
Professional two-way radio infrastructure operating within the specified frequency range
Industrial communication installations
Private VHF radio systems
Dedicated point-to-area communication systems
Actual suitability depends on the operating frequency, radio system requirements, local regulations, installation environment, and network design.
Solving Weak Directional VHF CoverageMany communication systems suffer from inadequate signal levels because the antenna is not optimized for the required coverage direction.
This antenna addresses that problem through its directional Yagi architecture and 8 dBi gain.
When properly oriented toward the required communication area, the antenna can concentrate RF energy where it is needed.
This can help improve:
Forward signal strength
Directional coverage
RF transmission efficiency
Communication stability
Signal reception from the intended direction
Overall antenna system performance
For customers upgrading from lower-gain antennas, the directional design can provide a practical way to optimize coverage without changing the entire radio system.
Reducing Unnecessary RF CoverageNot every communication system requires 360-degree coverage.
In many installations, transmitting energy in every direction can be inefficient because users or receiving stations are located in a specific direction.
The Yagi design solves this problem by providing a more focused radiation pattern.
This makes the antenna especially valuable when the objective is to direct RF energy toward a selected service area while reducing unnecessary coverage in other directions.
Designed for Fixed Outdoor InstallationsProfessional antenna performance depends not only on RF specifications but also on mechanical reliability.
This product is engineered for permanent outdoor deployment with a strong mechanical specification.
Mechanical Parameter
Specification
Installation Type
Outdoor Directional
Connector
N Female
Cable
40 cm LMR200
Pole Diameter
35–55 mm
Antenna Weight
1.1 kg
Overall Size
1200 × 1100 mm
Wind Rating
Up to 210 km/h
Operating Temperature
-40°C to +65°C
Antenna Cover Material
ABS
Lightning Protection
DC Ground
These specifications make the antenna suitable for professional installations where outdoor durability is an important consideration.
High Wind Resistance up to 210 km/hOutdoor antennas are continuously exposed to wind, weather, temperature changes, and environmental stress.
This antenna is rated for wind velocities up to 210 km/h.
The high wind rating is a significant advantage for customers installing antennas on exposed outdoor structures, rooftops, communication sites, or poles.
A properly installed antenna must remain mechanically stable while maintaining its intended orientation. This is particularly important for directional antennas because changes in antenna direction can affect the desired coverage pattern.
The strong wind rating therefore supports both mechanical reliability and consistent directional operation.
Wide Operating Temperature RangeThe antenna is specified for operation from -40°C to +65°C.
This wide operating temperature range allows the antenna to be considered for many demanding outdoor environments, including locations subject to cold winters, hot summers, and substantial temperature variation.
For distributors, RF system integrators, and professional installers serving multiple geographic markets, wide temperature capability can simplify product selection for outdoor communication projects.
DC-Ground Lightning ProtectionOutdoor antenna installations can be exposed to electrical surges and lightning-related conditions.
The antenna incorporates a DC-ground lightning protection configuration.
This feature adds another layer of protection for outdoor RF installations and supports the requirements of professional communication infrastructure.
Proper site grounding, surge protection, feeder installation, and lightning protection practices should still be implemented according to the overall RF system design and applicable installation standards.
N Female Connector for Professional RF IntegrationThe antenna uses an N Female connector.
N-type connectors are widely used in professional RF systems due to their robust mechanical construction and suitability for outdoor communication equipment.
For system integrators, an N Female interface makes it easier to connect the antenna with suitable feeder cables, jumper cables, surge protectors, RF equipment, and related accessories.
The antenna is also supplied with a 40 cm LMR200 cable according to the specified configuration.
This provides additional flexibility during installation and connection.
50-Ohm System CompatibilityThe antenna has a nominal impedance of 50 ohms.
This matches the impedance used by a wide range of professional RF radios, coaxial cables, connectors, and communication equipment.
Maintaining proper 50-ohm system impedance is important for reducing mismatch loss and supporting efficient RF power transfer throughout the complete antenna system.
Practical Pole-Mount InstallationThe antenna supports mounting on poles with diameters of approximately 35 mm to 55 mm.
This mounting range provides flexibility for different antenna support structures and installation environments.
For field installers, a defined pole diameter range simplifies planning before deployment and helps ensure the selected mast or mounting structure is compatible with the antenna.
The directional design also allows the antenna to be physically oriented toward the required coverage area during installation.
Lightweight Design for Easier DeploymentDespite its directional structure and overall dimensions of approximately 1200 × 1100 mm, the antenna weighs approximately 1.1 kg.
The relatively lightweight design can help make handling, transportation, installation, alignment, and maintenance easier.
This is particularly useful when antennas must be installed on elevated structures or poles where equipment weight can influence installation complexity.
ABS Antenna Cover for Outdoor ProtectionThe antenna uses ABS material for its antenna cover.
The protective structure helps shield critical antenna components from environmental exposure while supporting the mechanical requirements of outdoor deployment.
This design makes the antenna suitable for customers requiring a professional outdoor VHF solution rather than a basic indoor or temporary antenna.
A Strong Alternative to Omnidirectional VHF AntennasOmnidirectional antennas are appropriate when communication is required in all directions around the installation site.
However, they are not always the most efficient choice for fixed directional coverage.
When the target communication area is located mainly in one direction, this 8 dBi VHF Yagi antenna provides a more focused alternative.
The directional approach offers customers several practical advantages:
Higher directional gain
More focused forward coverage
Controlled horizontal beamwidth
Controlled vertical beamwidth
Better use of available transmitter power
Reduced unnecessary coverage
Improved directional system planning
This makes the antenna a compelling choice for customers who need performance-oriented VHF coverage rather than simple 360-degree radiation.
Built for System Integrators and Professional RF InstallersThis antenna is especially relevant to customers responsible for designing, installing, upgrading, or maintaining professional VHF communication systems.
Potential customer groups include:
VHF radio system integrators
RF communication system installers
Two-way radio equipment suppliers
Professional radio equipment distributors
VHF communication network operators
Industrial communication solution providers
Infrastructure communication contractors
RF engineering companies
Communication equipment wholesalers
OEM and ODM communication equipment providers
Organizations operating fixed VHF networks
Customers replacing existing directional VHF antennas
The dedicated 154–157 MHz frequency range should always be checked against the customer's actual operating frequency before the antenna is selected.
Ideal for Directional VHF Network UpgradesCustomers upgrading existing VHF networks often face several challenges.
Existing antennas may provide insufficient gain, overly broad coverage, poor directional performance, unsuitable connectors, inadequate outdoor durability, or limited environmental ratings.
This best-in-class directional solution brings several important performance characteristics together in one design:
Dedicated 154–157 MHz frequency coverage
8 dBi directional gain
VSWR ≤1.8
50-ohm impedance
Vertical polarization
75° ±5° horizontal beamwidth
55° ±5° vertical beamwidth
Up to 100 W power handling
DC-ground lightning protection
N Female RF connection
40 cm LMR200 cable
-40°C to +65°C operating temperature
Up to 210 km/h wind resistance
Pole mounting for 35–55 mm diameters
ABS antenna cover
This combination creates a highly integrated solution for professional directional VHF applications.
Customer-Centric Performance AdvantagesStronger Signal Where It MattersThe 8 dBi gain helps direct more RF energy toward the intended coverage area.
More Controlled CoverageThe 75° horizontal and 55° vertical beamwidth help customers design predictable directional coverage.
Efficient RF TransmissionVSWR ≤1.8 and 50-ohm impedance support efficient power transfer through the antenna system.
Professional Power CapabilityUp to 100 W input power allows integration into professional VHF radio installations.
Outdoor ReliabilityThe -40°C to +65°C operating temperature range and 210 km/h wind rating support demanding outdoor deployment.
Straightforward RF IntegrationThe N Female connector and LMR200 cable simplify integration with compatible professional RF equipment.
Practical Pole InstallationCompatibility with 35–55 mm poles supports common outdoor mounting configurations.
Directional Network OptimizationThe Yagi architecture allows RF energy to be focused toward the required communication area.
Complete Technical SpecificationsElectrical Specification
Performance
Frequency Range
154–157 MHz
Antenna Type
Outdoor Directional Yagi
Gain
8 dBi
VSWR
≤1.8
Input Impedance
50 Ω
Polarization
Vertical
Horizontal Half-Power Angle
75° ±5°
Vertical Half-Power Angle
55° ±5°
Maximum Input Power
100 W
Lightning Protection
DC Ground
Mechanical Specification
Performance
Connector Type
N Female
Cable Type
40 cm LMR200
Working Temperature
-40°C to +65°C
Antenna Weight
1.1 kg
Pole Diameter
35–55 mm
Antenna Size
1200 × 1100 mm
Rated Wind Velocity
210 km/h
Antenna Cover Material
ABS
Why Choose This VHF Yagi AntennaThis revolutionary outdoor directional VHF solution brings together the characteristics customers need for a professional fixed communication installation.
Instead of relying on a basic low-gain or omnidirectional antenna, customers receive a dedicated 154–157 MHz directional platform with 8 dBi gain, controlled beamwidth, professional RF power capability, and robust outdoor mechanical performance.
Its combination of 75° ±5° horizontal beamwidth and 55° ±5° vertical beamwidth provides controlled directional coverage. The ≤1.8 VSWR supports efficient RF transmission. The 100 W maximum input power supports professional radio systems. The DC-ground design adds protection for outdoor use.
Mechanically, the antenna is built to operate across a wide -40°C to +65°C temperature range and withstand wind speeds up to 210 km/h. Its N Female connector, 40 cm LMR200 cable, 35–55 mm pole mounting compatibility, 1.1 kg weight, and ABS protective structure make installation and integration practical for professional RF projects.
For customers seeking a game-changing combination of directional gain, focused VHF coverage, efficient RF performance, outdoor durability, and straightforward installation, this VHF 154–157 MHz 8 dBi Yagi antenna delivers a powerful solution for demanding fixed communication networks.
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VHF SISO 8 dBi Yagi Antenna
Model Number: VHF-SISO-YAGI-8
A high-gain outdoor VHF Yagi antenna designed to provide reliable, focused 154–157 MHz communication coverage with strong directional performance.
Features
- Stronger Directional Signal Coverage
- Stable 154–157 MHz Performance
- 8 dBi High Gain
- Efficient Low-VSWR Transmission
- Supports 100W Radio Systems
- Optimized Vertical Polarization
- Easy N-Female Integration
- Withstands 210 km/h Winds
- Reliable Extreme-Temperature Operation
- Built-In DC Ground Protection
Shipping Specifications
- •Dimensions (L×W×H): 1300×1200×90
- •Weight: 1.80kg







