DE2928437C2 - Circuit arrangement for splitting or combining HF power - Google Patents

Description

switched to the value —- in the end of the first transformaiit always the smallest portion

d. H. it will

tors. The denominator π always applies
the performance that is required

( —Λ

at least one line that is supposed to dissipate this smallest partial service (but also several that carry the same should dissipate the smallest partial power) each with the characteristic impedance Z to the branch point If larger power units are required in the same arrangement, the individual Branch lines rn'l the characteristic impedance Z are interconnected and brought to the nominal value Z by means of a transformer. The output transformers therefore have the transmission ratio

7 7

-: Z to -: Z

ttl \ JTi ₁

Where ^ m = n.

Two numerical examples should be given for explanation:

A transmitting antenna consists of two Dipohjpjppen, of which the first dipoly group-i-received the power should, while the other dipoly group should receive-ö-.

A transformer from

7 · ^Z

used, seven on its low-resistance part Lines with the characteristic impedance Z can be continued. One of these lines connects directly to the Dipole antenna connected, which is to receive the power, while the other six lines are combined be connected to a transformer that transforms from- ^ to Z. The outcome of this The transformer in turn has the characteristic impedance Z and can be routed to the other dipole group.

According to a further example, in a transmission system one consumer -A- needs the power, a second -A- and a third needs the rest. ^ -.

Here, according to the teachings of the invention, a transformer from Z: - ^ - can be switched on.

From the low-resistance side, there are 7 lines with the characteristic impedance of the second, one of which is fed directly to the consumer with the power.

Three further lines are combined and led with a transformer ^from £: Z to the consumer who needs each power. The 13 remaining lines are also combined and fed via a transformer to the consumer that needs the power.

1 sheet of drawings

Claims (2)

Patent claims: 1.Circuit arrangement for phase-locked, frequency-independent, non-uniform power distribution of uniform fractions of the power of an HF source to several consumers with an impedance Z equal to that of the HF source or for combining several HF sources on a common consumer with the same impedance, so that \ o characterized in that the circuit consists of: a) a single-stage or multi-stage line transformer and a branch circuit connected downstream with η line sections of a characteristic impedance equal to the value of the impedance of the RF source or the consumer, the line transformer being dimensioned in such a way that its output connection impedance resulting in the junction point is transformed from the value = to the value Z of the input connection impedance, t>) a single or multi-stage line transformer, which is connected upstream of each consumer, to which a power component in the amount of an integral multiple , ti the uniform power fraction ^. omitted, and its transformation ratio is chosen such that the value of the impedance of the consumer lying at its output to an input impedance value equal to the fraction ^ - of the output impedance. value is transformed, and which is designed in such a way that every consumer to which a power share is equal to the unitary fraction ^. the power is absent, is connected directly to one of the line sections of the branch circuit, the other consumers, however, are connected via the line transformers connected upstream to as many line sections of the branch circuit connected on the input side as this is the integer multiple m of the power fraction for each connected consumer. 2. According to the circuit arrangement according to patent application 1, a coaxial power distributor for phase-staring the door. frequency-independent, uneven power distribution, characterized in that the branching circuit in a terminating piece of a coaxial system in a ring-shaped arrangement symmetrically about the axis π inner conductor • sections for each a uniform jistur ₆ s component L , which are each combined directly or in a multitude of m are connected to the connections via power transformers. The invention relates to a circuit arrangement for phase-locked, frequency-independent, non-uniform distribution of uniform fractions I of the power of an HF source to several consumers with an impedance Z equal to that of the HF source or to combine several HF sources into one common load with the same impedance. Power splitters are often required in transmission systems to convert incoming transmitter power into divide several equal or unequal power levels. There is a requirement that in Question coming frequency range, the reflection factor remains unchanged and also the divider "ratio and the phase position of the divided power remains constant. In particular, it will required that the phase position of the partial power is the same regardless of frequency. To make such a power division the following measures have been applied so far: If the portion of the power to be coupled out is small compared to the continuous power, one uses Coupling loops, capacitive coupling arrangements or directional couplers. The directional coupler condition a phase jump that is frequency-independent, i.e. not broadband through an extension cable can be compensated. Capacitive and inductive decoupling (also mixed capacitive / inductive Couplings) have a not inconsiderable frequency response and prepare at high frequencies particular difficulties. The invention has the object of providing a To create a circuit arrangement with a power distributor that is broadband and can be divided into any Allows fractions of services or a combination of several services The problem posed is achieved by what is specified in the characterizing part of claim 1 Characteristics. Accordingly, the invention provides a power distributor. which is based on pure line transformation, whereby the transformation stages can be made broadband almost at will. The invention creates a simply structured performance distributor that leiuhi to the respective The operational requirements of the division or combination of services can be adapted. In order to be able to implement complicated distribution conditions, it is possible to use the same arrangement to switch several times in a row. The circuit arrangement according to the invention can be achieved by a structural configuration in accordance with PA 2 realized willow. An exemplary embodiment of the invention is described below with reference to the drawing. The only figure in the drawing shows a schematic one Representation of the circuit arrangement according to the invention for dividing or combining RF power. According to this exemplary embodiment, the total power P of a transmitter is divided into "sub-powers E. , of which a part is again combined into larger sub-powers. A first group shall -jp the achievement, a second Group - ^ of achievement and so on to the last Group JJi. performance. For this purpose, a line transformer Γ is used, which transforms the connecting wave resistance Z to the transmitter to a value - =. From this point / 7 lines are led away as symmetrically as possible with the wave resistance Z , and thus the Summeriwelleriwidersland of n lines is parallel