RH775B Telescopic Dual Band 144/430MHz Antenna | SMA-Male 2.15dBi Extendable Handheld Radio Antenna
The SHENGDA SD-RH775B is a dual-band telescopic handheld antenna designed for 144/430MHz VHF and UHF radios. Featuring a 2.15dBi gain, low VSWR (<1.5), and adjustable length from 110mm to 410mm, it provides enhanced signal performance compared to standard stock antennas.
Equipped with an SMA-Male connector and omni-directional radiation pattern, the SD-RH775B is ideal for amateur radio operators, portable two way radios, and outdoor communication applications requiring flexibility and improved reception.
- Model No.
- SD-RH775B
- Type
- Handheld Antenna
- Place of Origin
- China
- Frequency Range
- 144/430MHz
- Gain
- 2.15dBi
- Connector
- SMA-Male
- V.S.W.R
- Less than 1.5
- Impedance
- 50ohm
- Accept OEM
- yes
- Length
- 110/410mm
- Material
- TPEE
Product Overview
The SD-RH775B is a high-performance telescopic antenna engineered for dual-band operation at 144MHz (VHF) and 430MHz (UHF). Its extendable structure allows users to adjust the antenna length from 110mm (compact mode) to 410mm (extended mode) for optimized signal performance.
When extended, the antenna improves transmission distance and reception sensitivity, making it suitable for field communication, amateur radio operations, and emergency communication scenarios.
Electrical Specifications
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Frequency Range: 144 / 430 MHz
-
Gain: 2.15 dBi
-
The low VSWR ensures efficient power transmission and reduced signal reflection, contributing to stable and clear communication.
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VSWR: Less than 1.5
-
Impedance: 50 Ohm
-
Radiation Pattern: Omni-directional
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Polarization: Vertical
Performance Characteristics
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Length: 110 mm (collapsed) / 410 mm (extended)
-
Connector: SMA-Male
-
The telescopic metal structure provides flexibility and durability while maintaining portability for handheld radio users.
-
Color: Black
- 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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