Spectrum Visualization and Measurement of Power Parameters of Microwave Wide-Band Noise

Abstract

A method for an adequate visualization of a microwave intense noise spectrum envelope in a wide frequency range (several octaves), measurement of its power parameters, and detection of a narrow-band signal with unknown frequency and power against the noise background is presented. This method is based on an application of a nonheterodyne principle of microwave frequency (and power) conversion using a gyromagnetic converter, which operates in two regimes in turn: the resonance detection and the cross-multiplication. A block scheme and an operation of a two-channel measuring device combining the mentioned functions are discussed.

Analysis of Interaction Between a Crystallographically Uniaxial Ferrite Resonator and a Hall-Effect Transducer

“…They are widely used in various devices for microwave frequencyselective measurements, such as spectrum analyzers, measurers of spectral power density, and peak power meters [1,2]. Their operation typically requires very intense magnetization fields, especially as the operating frequencies increase to the extremely high frequency (EHF) band and above, and this is a shortcoming of ferrite applications.…”

“…However, the present-day high-quality resonators made of crystallographically uniaxial ferrites, such as monocrystalline hexagonal ferrites, do not require huge magnetic systems for achieving ferromagnetic resonance, since they have high internal field of magnetic crystallographic anisotropy [1][2][3].…”

Frequency-selective Power Transducers: Hexagonal Ferrite Resonator-semiconductor Element

“…Many applications require an adequate information about mm-wave (30-300 GHz) spectra of signals, e.g., spectral power density, peak power of pulse signals, integral power in the given frequency band, width and central frequency of spectrum [1,2]. Equipment for measuring power parameters of electromagnetic signals contains a primary measuring transducer and a secondary processing/display unit.…”

“…Frequency selectivity is assured by incorporating a monocrystalline hexagonal ferrite resonator (HFR) with a narrow ferromagnetic resonance (FMR) line. An advantage of an HFR is its high intrinsic field of magnetic crystallographic anisotropy, so it does not need massive bias magnetic systems for achieving FMR [2]. In the transducer, the HFR is in direct contact with a semiconductor element (SE).…”