SU1387075A1 - Resonance gate - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to increase the specific isolation and reduce the dimensions of the resonant valve. The valve contains a symmetric strip transmission line, the sideways of the central conductor (S1) 1 are connected to the lateral surface of the central conductor (S1) and installed between the CPU 1 and each of the grounded conductors 3 a ferrite plate (FP) 4 and a diesel engine. liner (DV) 5, as well as magn. the system. The side face of each FP 4, located opposite the loops 2, is aligned with the corresponding side face DV 5 and is located at a distance of 1 from the plane of connection of the loops 2 to the CPU 1. 1 (О, 3-0,7) h, where h is the length of each loop 2. Each DV 5 is made of a material with dia. permeability 1,5-5,0. 1 il.

Description

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The invention relates to radio engineering and can be used as a non-reciprocal device with resonant absorption of microwave energy.

The purpose of the invention is to increase the specific isolation and reduce the dimensions of the resonant valve,

The drawing shows the construction of a resonant valve.

The resonant valve contains a symmetric strip transmission line, the lateral surfaces of the center conductor 1 of which are connected parallel to the stubs 2, and installed between the center conductor and each of the grounded conductors 3 of the symmetrical KOBO transmission lines ferrite plate 4 and the dielectric pad 5, as well as a magnetic system.

Resonant valve operates as follows.

With the propagation of microwave waves in a resonant vent or valve, the valve effect is manifested when the ferrite plates 4 are located in a region with a circular polarization of the RF magnetic field, which is formed by two equal in. the amplitude of the vector, offset from one another by 90 in space and in time. The existence of such vectors is due to orthogonal currents flowing in the center conductor 1 and in the loops 2 when passing through a symmetric band transmission line of the microwave wave. These currents are out of phase by 90, since the input resistance of the loops 2 is reactive and has a capacitive character. The amplitudes of the components of the microwave magnetic field, excited by the currents flowing in the center conductor 1 and in the loops 2, vary along the loops 2 according to the exponential and cosine-like laws.

Thus, as you move away from the plane of connection of the loops 2

to the central conductor 1 HF, the magnetic field acquires an elliptical polarization.

When making dielectric inserts 5 of a material with a dielectric constant of 1.5-4.0 and combining the side face of each ferrite plate 4 located opposite the stubs 2, with the corresponding side face of the dielectric insert 5 at a distance of 1 (0.3-0 , 7) h, where h is the length of the loop, from the plane of connection of the loops 2 to the center conductor 1, the area with circular polarization of the magnetic field of the magnetic field expands significantly, which leads to an increase in the specific isolation. At the same time, the electrical length of the loops 2 remains almost unchanged and lies within (0.1-0.125), where A is the microwave wavelength,

Claims (1)

25 claims A resonant valve containing a symmetric strip transmission line, with side-mounted loops arranged parallel to the side surface of the center conductor, and installed between the center conductor and each of the grounded conductors of the symmetric strip transmission line a ferrite plate and a dielectric insert, as well as a magnetic system, distinguishes Sch and with the fact that, in order to increase the specific isolation and reduce the overall dimensions, the lateral face of the dielectric liner is located at a distance of 1 from the plane of connection of loops to the central conductor, equal to 1 (0.3-0.7) h, where h - the length of each ishef, while the shell of the dielectric liner is made of a material with a dielectric constant of 1.5-4.0,