SU702435A1 - Separating filter - Google Patents

Description

(54) DIVIDING FILTER

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Ivobretevie relates to microwave equipment, is used in antenna-water paths of radiorepine LIVIA for simultaneous transmission and reception of signals of the weighing frequency ranges on a cell. . The following separation filter is known: it contains two waveguide cuts connected along the common wall of the slit peep: in which resonant vibrators are 1 substituted ..

However, a well-known filter provides a split frequency and J:; optimized only in a narrow frequency band .; With a large width of the range, aka in frequency and saschasovanny not enough,. -. -.

The purpose of the invention is to increase development and improve consistency.

For this purpose, in the perfection and separation filter, the cross sectional size of the spinal willows of the waveguide is chosen critical at the frequency of the nonconverted signal for one of the higher type waves, which are coupled by a communication gap.

FIG. 1 is a diagram of a pre-filter, in FIG. 2, a communication element consisting of an injection gap and a resonance; vibrator, in FIG. 3 - equivalent circuit of the element of communication.

The separation filter contains two segments of the waveguide 1 and 2, connected by PB to the common wall of the coupling 3, in which resonant vibrators 4 are placed

(fig. i) .i,

Splitting filter is as follows.

The signals of the two working ranges c and f c enter the waveguide 1. The energy of the lower range 4 is fully branched off by the system of communication slots 3 and goes into waveguide 2. The signals of the upper range are almost not coupled and remain in waveguide 1. When the longitudinal slit 3 is excited in both type N waves are excited by full waves. At a frequency, for example, equal to a critical one for a wave, the constant propagation of this wave turns out to be zero, and in waveguide 1, the transverse wave is produced, this is the waveguide cross section contour 1 e Ba entey some shuntiruK1schey lyvmi, to rotkoramknutoy at the end (fig.d), nptneM okvvvaLeNtna length of this line pelomu a multiple number of half wavelengths (it aoperech resonance condition). Such a shunt pnvi ensures the absence of voltage Ii slit 3, t, slit 3 At this frequency, it wakes up, does not hold anergy, and does not reflect it, the LRP filter improves RH matching, and deterioration of other characteristics. ;

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Claims (1)

- -, Formula of the invention A raadolatory filter containing two waveguide segments connected along a common wall by holes in which resonant vibrators are located, so that, in order to increase equilibrium and improve matching, the cross-sectional size of the single-tioro of the waveguide bins is chosen as Critical at the frequency of the non-branched signal for one BiJctiiero wkw wave in one of the two communication gaps. Sources of igfermapii taken into account during the examination 1. Japanese patent M 51-: 0493, cl. H 01 R 1/20, publ. 1976 (prototype).