A.H. Systems has been established since 1974 and manufactures a complete line of affordable, reliable, EMI test equipment. Our individually calibrated Antennas, Preamplifiers, Current Probes and Low-Loss Cables satisfy many test standards including FCC, MIL-STD, CISPR, EN, VDE, IEC and SAE.
For 51 years we have been committed to providing all of our clients with no cost prompt and professional technical support. Manufacturing high quality products at competitive prices with immediate shipment plus prompt technical support are our goals to improve the quality of your testing requirements.
Not all antennas are created equal, and when it comes to frequency different antenna styles perform better at some frequencies and not at others. This guide will discuss special considerations that are sometimes required in antenna design typically at very high and very low frequencies....
These antenna kits have all the common antennas, current probes and accessories needed to satisfy a wide array of testing requirements....
Consult the specific standard for its requirements, which may list required antenna types or parameters like frequency range, gain, polarization, and test distance. Common standards often specify antennas suitable for different test types, such as horn or log-periodic antennas for high-frequency immunity, or dipole antennas for site attenuation.
In recent years, the use of a term call "Antenna Factor" in EMC and spectrum pollution work has become very important. There has been a great need for measuring field intensity and/or power density as accurately and conveniently as possible....
Antenna beamwidth determines the expected signal strength given the direction and radiation distance of an antenna. The beamwidth will vary given a number of different factors such as the antenna type, design, orientation and radio frequency. Understanding beamwidth and how it influences a test environment is critical to accurate and repeatable tests.
Here is our listing of different horn antenna types split up into three categories. The latest version of Mil-Std 461E states the used of broadband double ridge guide horn antenna as the antenna of choice for frequencies above 200 MHz. The double ridge guide horn antennas are an excellent choice where broadband coverage is required, these antennas cover 170 MHz up to 40 GHz. We also have a listing for standard gain antennas, or also known as pyramidal horns, these antennas are very precise and predictable through design parameters covering a range of 750 MHz up to 40 GHz. We also offer a series of octave horn antennas with low VSWR, medium gain and high input handling capabilities.
MIL-STD-461 is a military standard that defines electromagnetic compatibility (EMC) requirements for electronic equipment used in military applications. The standard ensures that electronic devices function correctly in electromagnetic environments and do not emit excessive electromagnetic interference (EMI). It applies to both ground-based and airborne military systems.
