SU557442A1 - Short piston - Google Patents

Description

one

This invention relates to radio engineering and can be used in waveguide and coaxial devices.

Known short-piston having holders, kapachok, low input resistance ij.

However, the known piston has significant dimensions.

A short plunger is also known, containing a rectangular or circular cap, mounted on a holder mounted on a rusk, and a stem rigidly connected to ringer 2 J.

However, the known shorting piston has considerable dimensions and

its contact resistance changes as the piston moves along the waveguide, as well as changes over time

The aim of the invention is to reduce the effect of contact resistance and reduce the size of the piston.

To do this, in a short-cut piston containing a cap mounted on a holder mounted on the cracker, and a rod rigidly connected to the cracker, the cap is designed as a hollow truncated cone and mounted inside the cracker. that the inner surface of the sukar and the outer surface of the cap is formed by a low-resistance line.

Fig, 1 shows a short-circuit piston; in fig. 2- diagram, lines and resistances formed by the piston.

The short piston contains a cap 1 mounted on a holder 2 mounted on cracker 3, and a stem 4 rigidly connected with cracker 3, the cap 1 is designed as a hollow truncated cone and installed inside the cracker 3 so that the inner surface of the cracker 3 and the outer surface of the cap 1, a bone-breaking line is formed, the piston is mixed in the waveguide 5, and the cap 1 is fixed on the holder 2.

The device works as follows.

Claims (2)

The piston structure consists of a tapered metal cap 1 long, rod 4, serving. to move the piston in the waveguide 5, the waveguide 5 where an effective short circuit of metal crackers 3 is provided, which gives the entire piston structure the necessary rigidity and with the aid of holder 2 a metal cap 1 is attached. The outer surface of the crackers 3 has a contact connection with the surface of the waveguide 5. Tapered the cap 1 is placed inside the cracker 3 and therefore the overall size of the piston has a length close to. The outer surface of the cap 1 is made in B. The form of a truncated cone, which, together with the conical surface of the biscuit 3, forms a low-resistance transmission line of length L / 4 and characteristic impedance f. This line is loaded on a short-circuited one, with characteristic resistance to the line formed by the inner surface of the cap 1 and the outer surface of the holder. 2. A shorted I -g / 4 segment of a line with resistance 2. in the -E plane has infinitely large co-resistance, which is transformed into the a – Z plane by an open D / 4 oov line with a resistance p in infinitely small resistance. Infinitely small resistance is the opposition between points a - g or between cap 1 (point); 1 end of rod 4 (point d}. Point:., And is common for rod 4 and for waveguide 5, and, sweetly, between the edge of the cap 1 and the wall of the waveguide 5, there is infinitely small resistance.The susceptible contact resistance, T, i.e., the resistance between the surface of the waveguide 5 and the rut 3, is shunted by an infinitely small input resistance p | and, therefore, no effect, at least in a wide range Piston operation. Formula of the invention. Short-nose. A piston pusher containing a cap mounted on a holder mounted on a rusk, and a rod rigidly connected to a cracker, characterized in that, in order to reduce the influence of contact resistance and dimensions, the cap is made in hollow truncated cone and installed inside the cracker so that the inner surface of the cracker and the outer surface of the cap orazovanna low-resistance line. Sources of information taken into account in the examination: 1. Ploukhin V, V. Coaxial band resonators. Soviet Radio, M., 1956, p. 132, 2, V. Lebedev. Microwave Appliances and Devices, Vol. 1. State Publishing House, M., 1961, p. 296. xs ss: sJZxS55 / 7 - r-t-t - / - ™ f 7./ ,//,444444444 ZZ # ZZZZZZZZZ22 7 7 AT f Tig.2