SU807415A1 - Power divider - Google Patents

Description

(54) POWER DIVIDER

one

The invention relates to a technique for dividing microwave power and can be used in devices with equal power divided by an arbitrary number of channels developed between each other when operating in the frequency range of about one octave.

A power divider is known, containing directional couplers, the primary lines of which are connected in cascade, and the non-working outputs of the secondary lines having equal spins are connected to the ballast resistors Llj.

However, the known power divider divides the power unevenly.

The purpose of the invention is to reduce the division unevenness.

The goal is achieved by the fact that in the proposed device, the primary lines of any two adjacent directional couplers are interconnected through an additionally introduced directional coupler, the two diagonal arms of which are shorted.

FIG. 1 shows a five-channel power divider; in fig. 2 - distribution of power across the channels.

The device contains directional couplers 1-5 with outputs 6-10.

Primary lines of directional couplers 1,2, 3 are connected in series. The primary lines of the directional couplers 3 and 5 are connected, through the two diagonal arms 11 and 12 of the directional couplers - 4, the other two diagonal arms 13, 14 of which are shorted. To non-working outputs of 15 secondary lines of equal length, directional couplers 1-3,5 connected ballast resistors 16 ..

The power divider works as follows.

The generator is connected to the input of the primary line of directional coupler 1. The transient attenuation (dB) of directional couplers are different and, depending on the number of directional coupler -i, is calculated by the formula

 10 Ig {N - (+ 1) Transient attenuation of the directional coupler 1 C 7 dB, therefore

Output channel 6 receives 1/5 of the input power. Using the directional coupler 2, which has a transient attenuation of C 6dB to output 7 of the coupler, a quarter of the remaining

Claims (1)

power, which corresponds to the fifth of the input power of the generator. Similarly, signals are generated at other outputs. At the same time, due to a decrease in the frequency response of the transmission coefficient of the directional tweeter 4, the two diagonal arms 13 and 14 of which are shorted, a small dip is created at the limiting frequencies of the amplitude-frequency characteristic of the power passing through the primary line of the directional coupler 5. As a result the output powers at outputs 9 and 10 are eliminated (Fig. 2), which leads to a significant reduction in the non-uniformity of the output powers of the divider as a whole. A small part of the input power, reflected from the sections of the directional coupler 4, whose two diagonal arms are shorted, dissipates in the ballast resistors 1b of the directional couplers 1-3, located between the generator and the directional coupler 4, and also leads to a weak increase in the input VSWR divider. Thus, the proposed divider output 10 of the primary line of which, unlike the known, is working, has a small unevenness of the output powers in the frequency band, on the order of one octave. The largest power losses are observed at the boundary frequencies at the output of the 10 primary line of the directional coupler 5 as far as possible from the divider input. As the output number decreases, the losses decrease as the number of directional couplers decreases, through which the signal from the divider input passes to the corresponding output. However, despite the presence of losses, the output power is distributed between the outputs 6-10 almost equally at the center frequency. The difference in power levels at the outputs 6-10 at the cut-off frequencies is explained by the non-uniformity of the frequency characteristics of the transmission coefficients of the individual directional couplers. Invention A power divider containing directional couplers whose primary lines are connected in cascade, and non-working outputs of secondary lines of equal length are connected to ballast resistors which, in order to reduce division non-uniformity, the primary lines of any two Adjacent directional couplers are interconnected through an additionally introduced directional coupler, whose diagonal arms are shorted. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 433573, cl. K 01 P 5/12, 1972 (prototype).