Log Periodic Antenna LP-75M1500M by Pulsar Instruments (Italy)
| Origin | Italy |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Import Status | Imported |
| Model | Log Periodic Antenna |
| Frequency Range | 75–1500 MHz |
| Max Input Power | 1000 W |
| Gain | 5.91 dBi @ 80 MHz |
| Optional Configurations | Horn Antenna, Stacked Log-Periodic Array |
Overview
The Log Periodic Antenna LP-75M1500M is a precision-engineered broadband directional antenna designed for high-fidelity electromagnetic field generation and radiated emissions testing in accordance with international EMC and RF metrology standards. Based on the classic log-periodic dipole array topology, this antenna operates on the principle of self-similar geometric scaling—where successive dipole elements follow a constant logarithmic ratio—to achieve consistent impedance matching and radiation pattern stability across its entire 75 MHz to 1500 MHz operational bandwidth. Its robust aluminum alloy construction, UV-stabilized dielectric support boom, and optimized element tapering ensure minimal phase distortion and high front-to-back ratio (>20 dB typical), making it suitable for calibrated field generation in semi-anechoic chambers (SACs), open-area test sites (OATS), and RF immunity validation per IEC 61000-4-3 and MIL-STD-461G RS103.
Key Features
- Continuous broadband coverage from 75 MHz to 1500 MHz without band switching or mechanical tuning
- High-power handling capability up to 1000 W CW, validated under thermal cycling and VSWR <1.8 across operating band
- Consistent gain profile: 5.91 dBi at 80 MHz, 6.61 dBi at 400 MHz, and 6.00 dBi at 1000 MHz—traceable to NIST-traceable calibration reports
- Integrated 50 Ω coaxial feed via Type N female connector, with gold-plated center pin and PTFE dielectric for low-loss transmission
- Modular mounting interface compatible with standard tripod adapters (¼”-20 UNC) and mast clamps (up to 76 mm OD)
- Optional stacked configuration available for enhanced gain (+3.5 dBi typical) and improved polarization purity in vertical/horizontal dual-polarized setups
Sample Compatibility & Compliance
This antenna is fully compatible with industry-standard RF signal generators, power amplifiers (including Class AB and solid-state broadband amplifiers), and EMI receivers used in pre-compliance and full-compliance EMC laboratories. It meets mechanical and electrical requirements for use in accredited test facilities operating under ISO/IEC 17025:2017. Calibration certificates include uncertainty budgets per ISO/IEC 17025 Annex A.3 and are issued with traceability to national metrology institutes (e.g., INRIM, Italy). The antenna supports compliance testing per CISPR 16-1-4, ANSI C63.4, FCC Part 15 Subpart B, and EN 55032/55024. Its passive design ensures no active components, eliminating drift or aging effects during long-duration immunity sweeps.
Software & Data Management
While the LP-75M1500M is a passive transducer, its performance data integrates seamlessly into automated EMC test systems via IEEE-488 (GPIB), LAN (SCPI over TCP/IP), or USB 2.0 interfaces when paired with compatible RF power meters, spectrum analyzers, or EMI receivers. Gain vs. frequency datasets are provided in CSV and S2P formats for import into EM simulation platforms (e.g., CST Studio Suite, FEKO) and test sequencing software (e.g., Teseq EMCO, Keysight PathWave). All calibration files include metadata compliant with IEEE 1528-2013 for antenna characterization documentation. Audit trails and calibration history are maintained in accordance with GLP and FDA 21 CFR Part 11 requirements when deployed in regulated pharmaceutical or medical device validation environments.
Applications
- Radiated emissions testing of industrial, scientific, and medical (ISM) equipment per CISPR 11 and EN 61326
- Radiated immunity evaluation of automotive ECUs per ISO 11452-2 and ISO 11452-8
- Field uniformity verification in SACs per ANSI C63.4-2014 Clause 5.3.2
- RF exposure assessment for wireless infrastructure (e.g., small cells, DAS nodes) in accordance with ICNIRP 2020 and IEEE C95.1-2019
- Calibration reference antenna for site attenuation measurements (NSA) and normalized site attenuation (NSA) validation
- Research-grade near-field to far-field transformation studies in antenna measurement ranges
FAQ
Is this antenna supplied with a calibration certificate?
Yes—each unit ships with a factory calibration report including gain, VSWR, and phase center location data, traceable to INRIM (Istituto Nazionale di Ricerca Metrologica), Italy.
Can it be used for both emission and immunity testing?
Yes—the LP-75M1500M is bidirectional and fully characterized for both transmitting (field generation) and receiving (emissions detection) modes per CISPR 16-1-4 Annex D.
What is the recommended maximum cable length between amplifier and antenna?
For minimal insertion loss and VSWR degradation, use low-loss flexible coaxial cable (e.g., LMR-600 or equivalent) with total run ≤15 m; longer runs require inline monitoring or VSWR compensation algorithms.
Does the antenna support circular polarization?
No—it is linearly polarized (horizontal/vertical orientation selectable via mounting); circular polarization requires external hybrid couplers or sequential rotation systems.
Is mechanical tilt adjustment included?
No—mechanical tilt must be achieved externally using calibrated gimbal mounts or motorized positioners; the antenna body includes ±5° fine-tuning slots on the mounting bracket.
