Why choose a directional log-periodic antenna for VHF measurements?

Directionality helps isolate the wanted transmitter and reduces off-axis pickup, improving selectivity during surveys and making interference localization and direction indication more practical in dense RF environments.

ARL108R/F170XZ Measurements logarithmic antennas 108-170 MHz

Q: What is the ARL108R/F170XZ used for?

ARL108R/F170XZ is a directional broadband log-periodic measurement antenna covering 108-170 MHz for radiomonitoring, direction finding, RF surveys and interference hunting in aeronautical and civil VHF services.

Q: Which element configurations are available?

Ordering options include a version supplied with unscrewed elements and a version supplied with folding elements, depending on transport and deployment requirements.

Q: What does V/H polarization mean in practice?

V/H polarization indicates the antenna can be used in vertical or horizontal polarization, useful when matching the polarization of the service under test or comparing both during measurement sessions.

ARL108R/F170XZ Measurements logarithmic antennas 108-170 MHz

Measurements Antennas

MONITORING ANTENNAS FOR MOBILE AND STATIONARY USE, PROVIDING COMPLETE COVERAGE RANGE 108 MHz TO 170 MHz

MOD. ARL108R/F170XZ – COD. ARL108R/F170XZ
Measurement - Monitoring Antenna

ARL108R/F170XZ Radiomonitoring VHF log periodic - Measurements logarithmic directional antennas 108-170 MHz Protel

Complete manual including:

• Internal calibration with typical gain factor
• Datasheet with general product characteristics
• Certificate of Conformity including the product serial number
• H/V radiation patterns
• Return loss test report
• K-factor calculation
• Assembly instructions

ELECTRICAL DATA
Frequency range A MHz 108÷170
Bandwidth MHz 62
Gain max . dBi 9.5
Return loss dB ≥ -14
VSWR ≤ 1.5:1
Nominal impedance Ω 50
Polarization Ω V/H
H beamwidth 108 Mhz -3 dB 90°
H beamwidth 140 Mhz -3 dB 80°
H beamwidth 170Mhz -3 dB 80°
E beamwidth 108 Mhz -3 dB 60°
E beamwidth 140 Mhz -3 dB 50°
E beamwidth 170 Mhz -3 dB 80°
Max Power W 200 W
Connector Nf
Lightning protection All metal parts are D.C. grounded
MECHANICAL DATA
Dimension length mm 1733Xh1384x130
Elements numbers 9
Weight without clamp kg 3.9
Wind surface m² Front 0.03 side 0.17
Front wind load Kg 1.1 ( 25 m/s )
Side wind load Kg 4.7 ( 25 m/s )
Mounting +/- 90° mm standard polarizer Ø 30
MATERIALS
Anticorodal alluminium - Brass - Teflon - Polyvinyl chloride - RoHS compliance
ACCESSORIES
SUPIS01 Isolation fiberglass pole Ø35 x 1000
BAG108170 Transport bag
ORDERING AND PACKAGING INFORMATIONS
ARL108F170XZ With unscrewed elements
ARL108R170XZ With folding elements
PACKAGING mm. 1800x200x200 / weight 5 Kg without clamps

Directional broadband logarithmic (log-periodic) high-gain antenna for measurements and radiomonitoring in the 108–170 MHz VHF range. This spectrum is widely used for aeronautical VHF services (navigation/communications segments within the covered span) and for multiple civil VHF users (e.g., land-mobile and marine channels within the band, depending on national allocations). Typical workflows include RF surveys, field-strength checks, coverage verification, direction indication and interference hunting where directionality improves selectivity and helps identify the source area of unwanted signals.

The antenna supports both fixed monitoring sites/control centers and mobile operations. For transport and deployment you can choose the most practical supply: ARL108R170XZ with folding elements to reduce bulk during missions, or ARL108F170XZ with unscrewed elements for packing/logistics requirements. V/H polarization supports measurement sessions where you must match or compare polarizations across services and scenarios.

Radiomonitoring
Direction Finding Antennas
RF Signal Search and Survey
Monitoring and measurement of RF signals

Antenna designed and manufactured in Italy.

Frequently asked questions about ARL108R/F170XZ

Quick answers for VHF (108–170 MHz) radiomonitoring teams, mobile survey units and fixed monitoring stations.

What is the ARL108R/F170XZ used for?

Directional broadband measurements in the 108–170 MHz range for radiomonitoring, RF surveys, direction indication and interference hunting.

Which services fall inside 108–170 MHz?

Typical targets (depending on regional allocations) include aeronautical VHF services (navigation/communications segments within range) and civil VHF users such as land-mobile and marine channels inside the covered span.

Why choose a directional log-periodic antenna for VHF surveys?

Directionality improves selectivity and reduces off-axis pickup, supporting more reliable surveys and helping localization and direction indication when troubleshooting interference.

Which element configurations are available?

Choose ARL108R170XZ with folding elements to reduce bulk during transport, or ARL108F170XZ with unscrewed elements for packing/logistics requirements.

What does V/H polarization mean in practice?

The antenna can be used in vertical or horizontal polarization, useful when matching the service polarization or comparing both during the same measurement session.

What documentation is included for professional reporting?

A complete manual can include internal calibration with typical gain factor, datasheet, certificate of conformity (with serial number), H/V radiation patterns, return loss test report, K-factor calculation and assembly instructions.

ARL108R/F170XZ Measurements logarithmic antennas 108-170 MHz - Protel Antennas - Professional Antennas for Telecomunications

ARL108R/F170XZ Measurements logarithmic antennas 108-170 MHz

Frequently asked questions about ARL108R/F170XZ

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