UHF Preselector — 380-450 MHz

380-450 MHz, min 3 MHz BW, 1.6 dB typical IL (1.3 dB tuned), 1.5:1 VSWR. 0.44 kg.

Frequency

380–450 MHz
Insertion loss

< 1.6 dB
Connector

N-Female
Weight

0.4 kg

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Specifications

Electrical

Frequency range	380–450 MHz
Insertion loss	<1.6 dB
VSWR (max)	1.5
Impedance	5 Ω

Mechanical

RF connectors	N-Female
Weight	0.4 kg
Dimensions (H × W × D)	34 × 111 × 103 mm

Configuration

Bandwidth Min Mhz	3
Il Typ Db	1.3
Il Max Db	1.6
Temperature Range	-30°C to +60°C

Verified 2026-05-06 · ALUNOR RF Engineering · source: ALUNOR RF Technical Catalogue 2026-01-21

All measurements at 25 °C, 50 Ω, unless otherwise noted.

Why this product

01

UHF 380-450 MHz, sub-half-kilo enclosure
02

1.3 dB typical IL at the tuned centre frequency
03

Adds 30+ dB out-of-band rejection in front of receiver LNA

Technical brief

Receiver front-end preselector

Compact bandpass preselector that protects receiver front-ends at congested UHF sites. Tuneable bandwidth (≥ 3 MHz minimum), 1.6 dB typical IL, 1.3 dB at the tuned centre.

Why a preselector matters

In dense RF environments, a strong out-of-band signal can desensitise even a high-quality receiver. The preselector adds 30+ dB of out-of-band rejection in front of the LNA — measurable noise-floor improvement at multi-carrier sites.