SD-JSD4 144/430MHz Dual Band Mobile Antenna | 2.5/3.5dBi PL259 VHF UHF Car Radio Antenna
SD-JSD4 is a dual band mobile antenna designed for 144/430MHz VHF & UHF communication systems. With 2.5dBi (VHF) and 3.5dBi (UHF) gain, ≤1.5 VSWR, and 50Ω impedance, it ensures stable omni-directional signal transmission for vehicle-mounted radios.
Built with stainless steel construction and equipped with a PL259 connector, the 500mm antenna offers reliable performance for ham radio operators, fleet communication, and outdoor mobile applications.
- Model No.
- SD-JSD4
- Type
- Combination Antenna
- Place of Origin
- China
- Frequency Range
- 144/430MHz
- Gain
- 2.5/3.5dBi
- Connector
- PL259
- V.S.W.R
- Less than 1.5
- Impedance
- 50ohm
- Accept OEM
- yes
- Color
- Black
- Length
- 500mm
- Material
- Stainless Steel
Dual Band Coverage
The SD-JSD4 supports:
-
144MHz (VHF band) – Suitable for long-range ground communication
-
430MHz (UHF band) – Provides stable performance in urban and complex environments
The optimized dual-band internal structure allows balanced radiation efficiency and smooth frequency switching.
Electrical Performance
-
Frequency: 144/430MHz
-
Gain: 2.5dBi (VHF) / 3.5dBi (UHF)
-
VSWR: Less than 1.5
-
Impedance: 50 Ohm
-
Polarization: Vertical
-
Radiation Pattern: Omni-directional
-
Connector: PL259
Low VSWR ensures efficient signal transmission with minimal reflection, improving communication clarity and system reliability.
Mechanical Structure
-
Length: 500mm
-
Material: Stainless Steel
-
Color: Black
The stainless steel whip provides flexibility, durability, and corrosion resistance, making it suitable for long-term outdoor vehicle installation.
- part of antenna is individual packed in PE/PVC Bag.
- Each antenna will be tuned to best performance before delivery.
- We will provide customized packaging services based on the size of your antenna products (such as length, diameter, interface type, etc.) to ensure zero damage during transportation.
- All packages have passed the 1.2m drop test
During the installation process, avoid any collisions.
It is strictly prohibited to disassemble the antenna components; otherwise, it may lead to poor antenna performance.
The installation position of the antenna should be free of any obstructions.
When used outdoors, it is necessary to equip with lightning protection facilities.
may contain electronic components. Do not discard them randomly.
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