SU1656610A1 - Two-channel phase modulator - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to reduce the amount of insertion loss. The modulator contains segments 1–8 of the transmission line, electrically controlled elements 9 and 10, and short-circuited loops 11 and 12. The input signal arriving at input 13, with equal amplitudes, goes to outputs 14 and 15. In this case, input 13 is matched and outputs 14 and 15 are developed among themselves. When the states (open or closed) of electrically controlled elements 9 and 10 change, the phase shift of the signals at outputs 14 and 15 changes. 1 sludge.

Description

The invention relates to radio engineering and can be used in receiving and transmitting equipment.

The purpose of the invention is to reduce the amount of insertion loss.

The drawing shows an electrical schematic diagram of a two-channel phase modulator.

The two-channel phase modulator contains the first to eighth sections 1-8 of the transmission line, as well as the first and second electrically controlled elements 9 and 10, in parallel with which the first and second short-circuited loops 11 and 12 are connected, respectively. The first end of the first segment 1 is the input 13, and the second end and the first end of the second segment 2 are the first and second outputs 14 and 15 of the dual-channel phase modulator, respectively. Lengths h - ho and wave resistances wi - wio. respectively, the first-eighth segments 1-8, as well as the first and second short-circuited loops 11 and 12 are selected from the ratios

E, -i-8g; 8L - arccos J2 coscf (1 - Ccosq})

in / Sin2lf „. п „п

e3r27qrcc ° 4 r C6intPj.

(7-л, р, Р. Р Ъ Ч. Tj- A-Cg, К6г - -, f - + -,

 6h -Jp ° rcctЈ (-YW + 2C2) i e o - arcc4 (-VW-2Cz) 34 ,. |;

w, v w, w "

| s; nq | W

n | l-2coe2Cf (1- CcosCf) z IsincylW

C l -sin2lfUЈco8 f + C) g

, - 0)

yo

0

SP

oh oh

ws.wft

w

 Mf-th /

- -,

W6-W7

w

TTT-,

C | "in (h) |

where I is the wavelength in the transmission line; L is the discrete value of the phase;

W is the normalizing wave resistance;

Y is the reactive component of the input conductivity of the first and second electrically controlled element 9 and 10;

G, g is the active component of the input conductivity of the first and second electrically controlled elements in the open and closed states, respectively.

The two-channel phase modulator operates as follows. The input signal to input 13. with equal amplitudes is fed to the first and second outputs 14 and 15. When the first and second electrically controlled elements 9 and 10 are in the open state, the scattering matrix of the device has the form

G1CH

J4

ABOUT

W

(2)

When the first and second electrically controlled elements 9 and 10 are in the closed state, the scattering matrix of the device takes the following form:

eacre

J

S-j4

No.

, - | h

w

about

jv

,

Cg

(3)

From expressions (2) and (3) it can be seen that input 13 is matched, and the first and second outputs 14 and 15 are interconnected, when the states of the first and second electrically controlled elements 9 and 10 change, the phase shift of the signals arriving at the first and second outputs 14 and 15.

Claims (1)

Claims of the invention A two-channel phase modulator containing the first segment of the transmission line. the first end of which is the input, and its second end is the first output of the de-ductal phase modulator, the second segment of the transmission line, the first end five 10 15 20 25 thirty 35 40 45 50 which is the second output of a two-channel phase modulator, the third and fourth segments of the transmission line, to the first ends of which are connected respectively, the first and second electrically controlled elements, the fifth segment of the transmission line, the first end of which is connected to the first end of the third segment of the line the transmission, as well as the sixth and seventh segments of the transmission line, characterized in that, in order to reduce the amount of insertion loss, the eighth segment of the transmission line, the first end of which is connected to the first end of the the second segment of the transmission line, and its second end to the first end of the fourth segment of the transmission line, as well as the first and second short-circuited loops, which are connected in parallel, respectively, to the first and second electrically controlled elements, the second ends of the second, third and fourth segments of the transmission line connected to the first end of the first segment of the transmission line, and to its second end - the second ends of the fifth and sixth segments of the transmission line; the seventh segment of the transmission line is connected to the first end of the third the transmission line is tripped, and the second end is to the first end of the second segment of the transmission line, the first end of the sixth segment of the transmission line is connected to the first end of the fourth segment of the transmission line, while the lengths H - ho and wave impedances Wi - Wio, respectively, first, second, third the fourth, fifth, sixth, seventh, eighth segments of the transmission line, as well as the first and second short-circuited loops are chosen from the ratios  ; 82 arccos Ј | 2cosif (l- Yasso) j e, cco5 (C51ps,) L –P3,  3 2f lga l c 1 h R./Hr.r.-. R.4. ±. 2 27 7 2 24- 1gL (-YW + 2C7b - “rcci -YW-eebif-l; W, Y, W, W4 42 | sinM | W -Jl-acos q O- Ccoscf) 1 Winlw C -sinzLf (l ЈСо5ср f с) g Wft " w W7-c | cc "() / W with l / l | ouz , / Ґ77, С | со5 (ч) | A is the wavelength in the transmission line; D is the phase discrete value; W - normalizing wave resistance, Y is the reactive component of the input conductivity of the first and second electrically controlled elements; G g is the active component of the input conductivity of the first and second electrically controlled elements in the open and closed states, respectively. ls vx cfg v | ljjl.rvvw-oy // nrx-o 7 7Y3i,