SU1755341A1 - Phase shifter - Google Patents

Abstract

The invention relates to radio engineering. The phase shifter contains a dielectric substrate, one side of which is metallized and made a slit of a length of 3 Box / 4, and on the other side there are first and second strip conductors arranged symmetrically and orthogonally to the slit, to which identical double-diode reflective cells connected in series are connected accordingly, the first and second varactor diodes and open sections. the invention relates to radio engineering and can be used in receiving and transmitting equipment, in measuring technique for controlling the phase of the signal. There are analogs of phase shifters made on strip transmission lines and varactor diodes containing single-reflection cells consisting of series-connected varactor diodes and corrective inductance. The disadvantages of such phase shifters are the narrow operating frequency band and the small linear range of the signal phase control characteristic (signals of the third and fourth strip conductors. To broaden the operating frequency band and improve the signal control characteristic of the signal in the A range, 360 ° first and second strip lines conductors are galvanically interconnected by an additionally introduced rectangular metal plate enclosed between two layers of dielectric that coincide with it in shape and a gap The symmetrically longitudinal axis of the slit orthogonal plane of the dielectric substrate, in the metallized side of which, under the first and second varactor diodes, additional first and second slits are made, symmetrically and orthogonally to the first and second strip conductors, in the middle of which are included the third and fourth varactor diodes, respectively, and the first and second strip conductors Ard / 4, where Yard is the wavelength of the cost-dielectric line. 1 il. Ate with the closest to the proposed one is a phase shifter containing a dielectric substrate, one side of which is metallized and a slit of a length of 3 Ds / 4 is made in it, where Ash is the wavelength in a symmetric slotted line, and the first and second strip conductors are placed on the other side, symmetrically and orthogonally arranged slits, with the two opposite ends of these strip conductors being the input and output of the phase shifter, and identical two-diode reflective cells, consisting of and XI SL SL N

Description

series-connected, respectively, the first and second paractor diodes and open segments of the third and fourth strip conductors, as well as the third and fourth warctor diodes. At the same time, the third and fourth spraying diodes are also connected in series with open segments of strip conductors, and the first and second strip conductors and diodes in reflective cells are connected by segments of strip conductors of length Ap / 4, where Al is the wavelength in an asymmetric strip.

The range of change in the phase of such a phase shifter is D 360 °, however, the operating frequency band is narrow, and the characteristic of controlling the phase of the signal has a significant nonlinearity. In addition, the design contains stripes of conductors that are critical to manufacturing tolerances, connecting diodes in reflective cells.

The purpose of the invention is to expand the operating frequency band and improve the linearity of the characteristic of controlling the phase of a signal in the range of 360 °.

This goal is achieved in a phase shifter containing a dielectric substrate, one side of which is metallized, and a slit of a length of 3 A / 4 is made in it, where A a is the wavelength in a symmetric slotted line, and on the other side there are first and second strip conductors located symmetrically and orthogonally to the slit, with the two opposite ends of these strip conductors being the input and output of the phase shifter, and to the other two ends identical identical diode reflection cells consisting of About the first and second varactor diodes and open segments of the third and fourth strip conductors, as well as the third and fourth varactor diodes, the first and second strip conductors are galvanically interconnected by an additional inserted rectangular metal plate between two coincident it by the shape of the dielectric layers and located symmetrically to the longitudinal axis of the slit orthogonal to the plane of the dielectric substrate, in the metallized side of which od and first and second varactor diodes are made additional first and second slots which are arranged symmetrically and orthogonally

the first and second strip conductors, in the middle of which the third and fourth varactor diodes are included, respectively, and the distance between the first and second strip conductors is Ard / 4, where / rd is the wavelength in the cost-dielectric line.

The drawing shows the proposed phase shifter, a General view.

The phase shifter contains a dielectric substrate 1, one side 2 of which is metallized, and a gap is made in it

3L / 4, where ASC is the wavelength in the symmetric slot line, and on the other

The strip conductors 4 and 5 are located on the side and are arranged symmetrically and orthogonally to the slits 3, with the two opposite ends of the conductors 4 and 5 being the input 6 and the output 7 of the phase shifter, and

identical two-diode reflective 1 cells 10 and 11, consisting of series-connected varactor diodes 12 and 13 and open sections of strip conductors 14 and 15, as well as varactor diodes 16 and 17 are connected to the other two ends 8 and 9. The strip conductors 4 and 5 are galvanically interconnected by an additionally inserted rectangular metal plate 18, enclosed

between two layers of dielectric 19 and 20 coinciding with it in shape and symmetrically located to the longitudinal axis of the slit 3 orthogonal to the plane of dielectric substrate 1, in the metallized side

2 of which under the varactor diodes 12 and 13 there are additional slots 21 and 22 arranged symmetrically and orthogonally to the strip conductors 4 and 5, in the middle of which are included the varactor diodes 16 and 17, respectively, and the distance between the strip conductors

4 and 5 is equal to Ard / 4, where Ard is the wavelength in the cost-dielectric line.

Phaser works as follows

in a way.

The signal supplied to the input 6, due to the implementation of compensated serial and parallel connections of two strip lines 4 and 5, is divided into half in a wide frequency band and with a phase shift of 90 ° in diode cells 10 through symmetric slotted 3 and edge-dielectric lines 18-20 and 11, operating on the principle of full reflection of the signal. Each reflective cell consists of an open strip 14 and 15 and a short-circuited slot 21 and 22 loops connected in series in one section of the line, the electrical length of which varies during control of the varactor diodes 12. 13 lines 14 and 15 and slots 21 and 22 of the following electrical length:

run arcctg {- tl ± jЈ - +

t. WQ i-n MIN

+ (Kc - (Zp 2

 2 UA Zn SMIN KS 2Zn

);

/ e og about 2 cm Cm. Kc + 1)

flu 2 arcctg G OUB Zm CMIN (KC - 1) i 2/2 w 2

1, 4J 9

where Ode - 2n: f0 - working frequency, Hz;

Cmin - the minimum value of the capacitance of varactor diodes, F;

Ks Smaks / Smin - coefficient of overlap in capacity;

Zo, Zn, 2SH - wave impedances of input arms 6–9, strip lines 14 and 15, and slots 21 and 22, respectively, Ohm. the electrical lengths of open and short-circuited loops in the control process synchronously change to / 2. As a result, the phase of the reflection coefficient of the diode cells 10 and 11 changes by 360 °. In-phase addition of the reflected signals is carried out at the output of the 7 phase shifter. Due to the inclusion of reflective cell diodes in heterogeneous transmission lines, the nonlinear distortion of the signal phase control characteristic is compensated.

Claims (1)

In the proposed phase shifter, the expansion of the operating frequency band and the improvement of the linearity of the characteristic of controlling the phase of the signal is achieved by constructing a design on a combination of different types of transmission lines and the inclusion of diodes in one section of the line. In addition, the design eliminates stripes that are critical to manufacturing tolerances, connecting the diodes of reflective cells. Invention Formula Phaser containing a dielectric substrate, one side of which is metallized and has a slit of a length of 3 A / 4, where Dy is the wavelength in a symmetrical slot line, and on the other On the 0 side, there are first and second strip conductors arranged symmetrically and orthogonally to the slit, with the two opposite ends of the strip conductors being the input and output 5 phase shifters and identical two-diode reflective cells, each of which consists of successively connected first and second varactor diodes and open segments of the third and fourth strip conductors, and the third and fourth varactor diodes, which are that, in order to expand the operating frequency band and improve. 5, the linearity of the phase control characteristic of the signal in the range, the first and second strip conductors are galvanically interconnected by a rectangular metal plate, which 0 is placed between two layers of a dielectric that coincide with it in shape and is located symmetrically to the longitudinal axis of the slit and is orthogonal to the plane of the dielectric substrate, in the metallized side 5 of which, under the first and second varactor diodes, additional first and second slots are made, located symmetrically and orthogonally to the first and second strip conductors, in the middle 0 which included the third and fourth varactor diodes, respectively, and the distance between the first and second strip conductors is Dd / 4, where Ard is the wavelength of the cost-dielectric line. / $ /. I X -......; ...:;. L: -: i