PHASE-FREQUENCY DEVICE ON A RECTANGULAR WAVEGUIDE PARTIALLY FILLED BY DIELECTRIC
DOI:
https://doi.org/10.26906/SUNZ.2022.4.158Keywords:
phase-frequency device, mobile digital troposcatter – radiorelay station, rectangular waveguide partially filled by dielectric, slotted bridge, directional couplerAbstract
The article considers a decrease in the magnitude of power losses in a phase-frequency device on a rectangular waveguide partially filled by dielectric on the way to ensuring the constancy of the phase ratio for both frequency subranges when only the amplitude ratio changes. The paper presents the design of a phase-frequency device based on a rectangular waveguide partially filled by dielectric using directional couplers. The qualitative nature of the distribution of signal amplitudes in the frequency subranges 1 and 2 depending on the phase βl is shown. The dependences of the efficiency on the phase shift for various values of the transient attenuation of a two-element directional coupler on a rectangular waveguide partially filled by dielectric and amplitudes at the middle frequency are plotted. The minimum value of the attenuation of the reflected wave that enters the input п2 when a signal is applied to the input п1 is calculated depending on the magnitude of the frequency detuning. A formula is proposed for the transient attenuation of a two-element directional coupler on a rectangular waveguide partially filled by dielectric. The scheme of signal addition in the antenna-feeder path, which uses a preliminary branching of signals with a constant phase ratio, is considered.Downloads
References
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