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Loop Antennas
A circle or rectangle shaped antenna consisting of one or more compete turns of a conductor and measures field strength's frequency <30 kHz.
See Also: Antennas, Broadband Antennas, Log Periodic Antennas, Directional Antennas, HF Antennas, Biconical Antennas, Horn Antennas, Isotropic Antennas, Antenna Software, Antenna Analyzers, Dipole Antennas
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Passive Magnetic Antennas, TX-Loop Antennas
A passive loop antenna which is matched to a resonance frequency of 13.56 MHz with 370 kHz bandwidth (-3dB)The purpose of the antenna is to produce defined magnetic fields at 13.56 MHz efficiently, i.e. to test near field communication devices (NFC) or RFID equipment.
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Antenna, Loop
EM-6879 | 10 KHz – 30 MHz
The EM-6879 Loop Antenna is used for magnetic field measurements over the frequency range of 10 kHz to 30 MHz. The EM-6879 is designed for use with any 50 ohm Receiver System. The antenna has a balanced Faraday shield that reduces its response to electric fields to a vanishingly small amount so that it can produce a practically pure magnetic field response.
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3-Dimensional Loop Antenna Van Veen
Loop Antenna System ( LAS )3-dimensional large loop antennadiam. 2 macc. EN 55015 / CISPR 15
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Antenna, Loop
EM-6874 | 20 Hz – 30 MHz
The EM-6874 Loop antenna is nominally used 20 Hz to 30 MHz and is designed for uncalibrated substitution measurements of shielding effectiveness as described by MILSTD-285, IEEE STD 299, and NSA-65-6.
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Antenna, Loop
EM-6871 | 30 Hz – 1 MHz
The EM-6871 Antenna can be used with any 50 ohm /Receiver/Field Strength Meter to obtain magnetic field measurements from 30 Hz to 1 MHz.
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Antenna, Loop Sensor
EM-6873 | 20 Hz – 100 KHz
The EM-6873 Loop Sensor Antenna uses passive circuits to transform magnetic field components between 20 Hz – 100 kHz to an equivalent open circuit two-terminal voltage on the receiving instrument. Use of the conversion Factor Chart, supplied with each antenna, will yield the strength of the magnetic induction field referenced to a uniform field. The loop is electrostatically shielded and therefore is sensitive only to the magnetic component (B-field) of the electromagnetic fields.
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Antennas
Antennas - ranging in size from small VHF/UHF through large rotatable HF arrays of over 70 feet long. Physically small antennas, including HF compact magnetic loops and end loaded HF versions.
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Active Loop Antenna
AL-130R
Also known as Magnetic Loop Antenna, the AL-130R is compliant with CISPR 16-1-4. It is ideal for emissions measurements as required by various EMC standards such as FCC 18, CISPR 11, CISPR 13, CISPR 14, CISPR 32 and many more. The built-in, low-noise preamplifier, increases overall measurement sensitivity as well as the overall signal to noise ratio. As per ANSI C63.4-2014, the use of active loop antenna for compliance testing is permitted in a non-sheilded environment ONLY if the saturation indicator is continuously monitored during the course of testing. Com-Power’s Remote Antenna Interface (RAI-100) comes in very handy for this application. It is a compact controller which can be used to enable/ disable RF measurement circuit and monitor saturation and battery low conditions remotely via a fiber optic cable up to 30 mtrs in length.
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Loop Antennas
A.H. Systems' designs, manufactures and delivers high performance Loop Antennas for a wide range of magnetic field testing. Whether used in a set to measure shielding effectiveness per MIL-STD 285 and NSA 65-6 or individually to satisfy specific requirements,
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Field Strength Meters
FIM-22 And FIM-41
The Models FIM-22 and FIM-41 are portable field strength meters designed to provide precise, direct measurements of electro-magnetic fields in the 200 kHz to 5.0 MHz spectrum. These units include a receiver, integral shielded loop antenna, precision attenuator, internal calibration source, and battery power supply. With calibration accuracy traceable to the National Institute of Standards and Technology, the FIM-22 and FIM-41 meet the most exacting requirements of government and industry. Their hinged covers, on the rugged drawn aluminum cases, contain a loop antenna. Opening the cover to a vertical position connects the antenna terminals to the receiver via maintenance-free gold-plated contacts. An interlock switch prevents inadvertent battery discharge when the cover is closed.
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8 Direction Receiving Loops Antenna System
AS-SAL-12/20/30 - Mark II
The Array Solutions Shared Apex Loop™ Array (AS-SAL-12 Mark II, AS-SAL-20 Mark II, and AS-SAL-30 – Mark II) is an improved version of the new type of receiving antenna that delivers exceptional directivity in a compact package and is useable over a wide range of frequencies without need for adjustment. This array opens the door to a new class of compact, high performance, wideband receiving antennasdeveloped for both amateur and professional users.
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Loop Antenna
ZHX7-0.009-200-1486
Loop Antenna, Frequency 0.009~200MHz, Linear Polarization, N-Female
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Antennas
The PLA-R and PLA-T are active, battery powered receive and transmit loop antennas for the frequency range 9 kHz - 30 MHz intended for radiated emission testing (PLA-R) and site validation: Normalized site Attenuation, Shielding Effectiveness (PLA-SET consisting of PLA-R and PLA-T)
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Antenna, Active Loop
EM-6869 | 9 KHz – 50 MHz
The Electro-Metrics EM-6869 Active Loop Antenna is used with any receiver or spectrum analyzer with 50 ohm input and covers the frequency range of 9 kHz to 50 MHz.
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Antenna, Active Loop
EM-6876 | 9 KHz – 30 MHz
The Electro-Metrics EM-6876 Active Loop Antenna is used with EMI Receivers and Spectrum Analyzers with 50 ohm input and covers the frequency range of 9 kHz to 30 MHz.
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Active Loop Antennas / Magnetic Field Probes
Is an active, shielded handheld loop antenna with nearly con- stant antenna factor over the entire frequency range. It can be used for testing according to CISPR, MIL, FCC, EN, ISO, ANSI, ETSI and many other standards.
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Loop Antennas
A loop antenna is a radio antenna consisting of a loop or coil of wire, tubing, or other electrical conductor, that for transmitting is usually fed by a balanced power source or for receiving feeds a balanced load.
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Antennas for EMC testing
The Laplace antennas cover 3 main groups...*Conventional log periodic types for OATS applications.*Miniature antennas for chamber and small enclosure applications.*Large loop antenna for EN55015 compliance testing.
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Active Loop Antenna
KH30935
Beijing KeHuan Century EMC Technology Co,.LTD
KH30935 active loop antenna is used for adjusting, testing, measuring and other receivers. It has many advantages:1. The antenna coverage frequency is wide: 150KHz ~ 30MHz .2. The field strength value is measured according to the correction coefficient within the effective frequency range, which is convenient to use.3. The antenna has a small outer diameter and light weight, which is convenient for outdoor measurement.
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Active Dual Loop Antenna
KH30936
Beijing KeHuan Century EMC Technology Co,.LTD
KH30936 active dual loop antenna is used for adjusting, testing, measuring and other receivers. It has many advantages:1. The antenna coverage frequency is wide: 150KHz ~ 30MHz .2. The field strength value is measured according to the correction coefficient within the effective frequency range, which is convenient to use.3. The antenna power is supplied by the host, which is convenient for outdoor measurement.4. Compared with the single loop antenna, the advantage is to read the maximum value directly, which eliminates the tedious steps of rotating the antenna to find the maximum value and the interference of the human body to the signal.
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Three Loop Antenna
VVLA-30M
The three loop antenna VVLA-30M is a standard measurement antenna according to CISPR15-2005/GB17743-2007 standard
, it can work with LISUN EMI-9KA / EMI- 9KB EMI Receiver System for EUT magnetic field radiation measurement between X, Y and Z planes. The antenna measurement is accurate, switch conveniently and it can completely replace imported products. -
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VECTOR-GUN HANDHELD DIRECTION FINDING ANTENNA SYSTEM
HFDF
National RF's Type HFDF active directional antenna system consists of a high gain RF amplifier coupled to a tunable Faraday shielded loop antenna. Several loop antenna assemblies are available to provide coverage of frequencies in the HF and low VHF spectrum. Due to the nature of a Faraday shielded loop, the antenna exhibits a sharp null through the diametric center of the loop. This null is used to determine the direction of incoming radio signals or to locate electrical noise being radiated from some source. The internal high gain amplifier is used to compensate for the inherent inefficiency of the actual loop at the operating frequency. Overall, the system dynamic response is about +6 dB as compared to the dynamic response of a dipole. To aid in the direction finding process on strong signals, an internal 30 DB attenuator is provided. As the loop antenna presents a bi-directional response, tri-angulation may be required to eliminate the ambiguous signal direction. The line of site of the incoming signal is determined by listening for a signal null on the receiver or by watching the receiver’s S-meter.
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ELT STALKER Vector-finder
VF-121
The Vector-Finder Types VF-121 and VF 121A are unique in the Vector-finder series of direction finding antennas. They incorporate a proven design, electro statically shielded loop sensing element with modern solid state low noise analog and digital technology to allow detection and location of aircraft band signals. Both the VF-121 and the VF 121A incorporate a unique digital modulator which allows the user to more easily home-in on unmodulated carriers. Such cases occur at airports when transmitter may be accidentally keyed on during aircraft overnight layovers. The VF-121 is specifically designed to be used on airport premises where signal strengths are high. To compensate for very strong signals, an integral attenuator is also incorporated to allow the user to operate the unit close-in to aircraft. The VF-121A differs in that a high gain, low-noise preamplifier is utilized with the sensing element in order to hunt signals that may be weak or at a distance. The unit is ideally suited for the location of ELT transmitters in the field. Both units are tunable over the 118 MHz to 130 MHz aircraft frequencies and interface directly to the user’s aircraft band receiver or transceiver via the antenna jack. With the antenna system connected to the receiver, the user will hear the desired signal. If the signal is unmodulated, the digital modulator will generate a tone on the carrier. When the handheld unit is rotated about, an audible null on the received signal or the generated tone will be heard. This null aligns with the axis of the equipment case and represents the direction of the received signal. This direction may be read from the black dial compass mounted on the top of the enclosure. As the response is bi-directional, triangulation may be used to determine the true bearing when the true direction is not known.
