A Reverberation Chamber for Antenna Measurements up to 140 GHz

In this paper, we design and verify a mmWave reverberation chamber operating in the 24-140 GHz band. The chamber is designed to facilitate over-the-air measurements of next-generation integrated antennas operating at high frequencies. For such systems, it is important to perform fast and accurate measurements of the radiated or received power over a wide frequency range. The reproducibility of our proposed chamber configuration is on average over the frequency band better than 0.2 dB when using the minimum advised number of mode-stirring samples. The chamber loss does not exceed 42 dB, and the chamber-decay time remains approximately 0.3 μs across the frequency range, indicating that the chamber would likely remain operational above 140 GHz. As an example of the performance of the chamber, we show that antenna-efficiency measurements can be performed within only a few percent expanded uncertainty.