HMC1010 is specified to work to 3.9 GHz. Will it still work at 4.5 GHz (possibly with degraded performance)? Are there any similar devices that are specified to operate at 4.5 GHz?
HMC1010 is an RMS detector specified to work to 3.9 GHz however HMC1010 still works beyond 3.9 GHz with some performance degradation. We don’t have specific test data at 4.5GHz but it can be anticipated from 3.9 and 5.8 GHz test data that we measured previously. Below plot illustrates the log conformance performance of HMC1010 at both 3.9GHz and 5.8Ghz. The log conformance curves for 4.5 GHz would be somewhere between them. It is not measured but temperature stability of HMC1010 is expected to degrade beyond 3.9 GHz.
HMC909 is specified up to 5.8 GHz and pin-compatible to the HMC1010. It operate with a single-ended input interface over whole frequency band and do not require matching components while HMC1010 requires matching components or a balun for single ended operation. HMC909 would have a little lower dynamic range at room temperature however provide better temperature stability beyond 3.9 GHz.
HMC909 is spec'd up to 5.8 GHz and is pin-compatible to the HMC1010. However, in terms of input dynamic range the HMC909 is covering about 20 dB less at the high end, i.e. HMC909 up to -11 dBm vs. HMC1010 up to +10 dBm. As to any quantitative description for the anticipated performance degradation when operating the HMC1010 above the specified max. frequency of 3.9 GHz, the datasheet does not yield any information; however, at least the input return loss (s11) certainly looks good up to 4.5 GHz (and even further; cf. plot on p. 11-8 of datasheet v03.0511), which by itself is insufficient to establish detector performance.
Thanks. This is very helpful.
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