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Achieving Accurate E-band Power Measurements with E8486A Waveguide Power Sensors

Application Notes

The 60 to 90 GHz spectrum, or E-band, has been gaining more millimeter wave (mm-wave) application interest in the recent years. There are a few reasons for this. The E-band has no or little license governance for frequency bands of 60 GHz, and 70 to 80 GHz. These spectrums have wider usable bandwidth and are hence able to handle super high speed communication transmissions. E-band products also require smaller antennas, making the overall product designs and packaging more interesting—as well as challenging. Among the applications for E-band are high-speed mobile backhaul, point-to-point radio communication, automotive radar for collision avoidance and car safety, and the 802.11ad or WiGig communication standard.

In most cases, the E-band mm-wave devices or modules in the applications mentioned above have either a WR-12 waveguide or 1-mm coaxial connector, particularly on the output path of the transmitter or power amplifier. For high-power mm-wave applications, waveguides are commonly used since they provide better transmission with low loss and good shielding. When measuring the RF power from these devices using power meters and sensors, the connectors on the power sensors must be selected correctly in order to reduce the mismatch measurement uncertainty.

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Column Control DTX