Beamwidth and directivity shape accurate RF and EMC antenna testing
Antenna beamwidth directly impacts RF testing accuracy by controlling signal coverage and directivity. Narrower beamwidth increases antenna gain and focus, while wider beamwidth improves coverage consistency across EMC and compliance testing environments.

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Welcome to A.H. Systems, inc.
A.H. Systems has been established since 1974 and manufactures a complete line of affordable, reliable, EMI test equipment. Our individually calibrated EMI Test Antennas, Preamplifiers, Current Probes and Low-Loss Cables satisfy many test standards including CISPR, MIL-STD, FCC, EN, VDE, IEC and SAE. With a wide variety of mounting configurations, we can also offer tripods and accessories that compliment other EMI testing equipment used to complete your testing requirements. We are also 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.