SU581535A1 - Wave-guide resonator - Google Patents

Description

(54) FIBER RESONATOR

one

Escapes are related to the technique of super-frequency (UHF) and can be used as an independent element as a band-pass filter resonator.

A waveguide resonator is known, which contains a cutoff rectangular waveguide with diaphragms consisting of several inductive rods, and a tuning element | 1.

However, the known resonator has a small damping value at the frequency of monics, because the distance between the orifices is close to half the working wavelength or a multiple of half the wavelength at harmonic frequencies. With this distance NIN between the diaphragms, the resonator at harmonic frequencies is close; According to the bandpass filter, it introduces a slight attenuation at these frequencies.

The purpose of the invention is to increase the attenuation at the harmonic frequency.

To do this, in a waveguide resonator containing a segment of a rectangular wave and with diaphragms consisting of several inductive rods and epems tuned, each of the inductive rods of one of the diaphragms / provided with additional inductive rods installed parallel to the wide wall of the rectangular waveguide the outer surface of a hollow metal cylinder electrically connected in the middle part with an inductive rod and located coaxially with it, and the length of the hollow metal metal Skog iilnndra and overall length dotolnitelnyh inductive rods is / Polovnev dlnny; harmonic waves.

The drawing shows the proposed (resonator.

Claims (1)

The waveguide resonator contains a segment of a rectangular waveguide 1 with diaphragms 2 and 3 consisting of several inductive rods 4 in S, and a tuning element 6. Each of the inductive rods 4 of one of the diaphragm 2 is equipped with additional inductive rods 7, mounted parallel to the wide wall of the rectangular waveguide 1 and fixed along the outer surface of the hollow metal cylinder 8 electrically connected in the middle part with the inductive rod (4 and The hollow metal cylinder 8 shtav in the total length of the additional inductive rods 7 is equal to half the harmonic wavelength. The operating frequency and ar MONICA frequency signals (for example, the second) are step to the resonator input. In order for the operating frequency signal to pass through the resonator without noticeable losses (with high matching), the conductivities of diaphragms 2 and 3 must be the same. The conductivity of diaphragm 3 is equal to the number (M and inductor rods 5, and also, their location in the psnomyuruk plane of the rectangular waveguide 1. The method of calculating the geometric parameters of such aaerisms is well known. The conductivity of the diaphragm 2 is also determined by the number, diameter and location of the inductive rods 4. in the pschterechnaya plane of the rectangular waveguide 1. The geometrical parameters of this diaphragm (in order to achieve the need for a wire) are determined experimentally. It should be noted that, in practice, the diameters of inductive rods 4 diaphragms are 2 large and I diameters of inductive rods 5 diaphragms. We 3. This is explained by the presence of a hollow metal cylinder 8, closed in the middle of the plate 9, which creates an inductive resistance at the fundamental frequency, since the depth of the hollow metal cylinder is less than a quarter of the working wavelength. The distance between the diaphragms 2 and 3 is chosen close to half the wavelength. At this distance, the reflection from the two diaphragms 2 and 3 is mutually compensated, and the signal of the working frequency band arrives at the output of the resonator with a slight attenuation. The tuning of the resonator in the working frequency band is made with the help of the element in the settings. The harmonic signal psi excites rods 7 and hollow metal cylinders 8 inductively. Since their length is chosen to be close to half the harmonic wavelength, they intensively reflect its power. At the same time, hollow metal cylinders 8 are excited by those types of waves, the vector of the Alvktrichsky floor of which has a component parallel to the hollow metal cylinder 8 (for example, by the waves H |, Hj I., etc.). The depth of the hollow metal cylinder 8 is the harmonic wavelength quarter / Inductive rod is excited by those wave waves whose vector electric field contains a component parallel to it (for example, waves, H ||, EIJ, etc.). Thus, diaphragm 2 effectively reflects the energy of the harmonic on all types of waves, the pacTpocif of which is possible in the waveguide at the harmonic. A third and higher harmonic suppression resonator is constructed in a similar manner. The proposed waveguide resonate 4 can provide harmonic attenuation of more than 30 dB. Invention A bipolar resonator comprising a section of a rectangular waveguide with diaphragms consisting of several inductive rods and a tuning element characterized in that, in order to increase the attenuation at the harmonic frequency, each inductive rod of one of them is provided with an additional inductive G rod mi installed parallel to the wide {wall of a rectangular waveguide and fixed on the outer surface of a hollow metal cylinder electrically connected in the middle of an inductive plug therein and positioned coaxially with it, where the length of a hollow metal cylinder and the total length of the additional inductive rods equal to half the wavelength of the harmonic. Sources of information taken into account in the examination: 1. Mod, spruce A. M. Microwave filters in radio relay systems. M., St. Don, 1967, p. 95-99.