SU824452A1

SU824452A1 - Microbandpass balance mixer

Info

Publication number: SU824452A1
Application number: SU792747395A
Authority: SU
Inventors: Алексей Евгеньевич Панов; Марта Михайловна Безлюдова
Original assignee: Предприятие П/Я А-3325; Предприятие П/Я А-7866
Priority date: 1979-04-02
Filing date: 1979-04-02
Publication date: 1981-04-23

Description

Изобретение относится к радиотехнике и может быть использовано в приемных сверхвысокочастотных устройствах.The invention relates to radio engineering and can be used in receiving microwave devices.

Извес-тен микрополосковый баланс- 5 ный смеситель, содержащий корпус и полупроводниковые диоды, к одним электродам которых подключены тракты сигнала и гетеродина со входами сигнала и гетеродина, а к другим элект- Ю родам подключены режекторные фильтры, настроенные на частоту сигнала и соединенные с выходом промежуточной частоты Γι].A microstrip balance mixer is known, which contains a housing and semiconductor diodes, the signal and local oscillator paths with the signal and local oscillator inputs are connected to one electrode, and notch filters tuned to the signal frequency and connected to the output are connected to other electrodes intermediate frequency Γι].

Однако известное устройство слож- 15 но и имеет достаточно большие размеры, что приводит к выполнению условий для возникновения и далее распространения волн типа <4 Н_оп и о4 Е_оп , что создает дополнительные потери. 20However, the known device is complex and has rather large dimensions, which leads to the fulfillment of conditions for the emergence and further propagation of waves of the type <4 N _op and o4 E _op , which creates additional losses. 20

Цель изобретения - уменьшение габаритов и упрощение устройства.The purpose of the invention is the reduction of dimensions and simplification of the device.

Поставленная цель достигается тем, что в известный микрополосковый балансный смеситель, содержащий корпус 25 и полупроводниковые диоды, к одним электродам которых подключены тракты сигнала и гетеродина со входами сигнала и гетеродина, а к другим электродам - подключены режекторные фильтры, 30 настроенные на частоту сигнала и соединенные с выходом промежуточной частоты, тракт сигнала выполнен в виде двух четвертьволновых линий, образующих делитель, к общей точке которого подключен вход сигнала, а тракт гетеродина выполнен в виде четвертьволновой двухпроводной линии, один из проводников которой соединен со входом гетеродина, а другой - корпусом.This goal is achieved by the fact that in the well-known microstrip balanced mixer containing the housing 25 and semiconductor diodes, to one electrodes of which are connected the signal and local oscillator paths with the inputs of the signal and local oscillator, and to the other electrodes are connected notch filters 30 tuned to the signal frequency and connected with the intermediate frequency output, the signal path is made in the form of two quarter-wave lines forming a divider, to the common point of which the signal input is connected, and the local oscillator path is made in the form of quarters wave two-wire line, one of the conductors of which is connected to the input of the local oscillator, and the other to the housing.

На фиг. 1 и 2 представлены конструкции предлагаемого устройства.In FIG. 1 and 2 presents the design of the proposed device.

Микрополосковый балансный смеситель содержит корпус 1, полупроводниковые диоды 2, тракт сигнала, выполненный в виде двух четвертьволновых линий 3, образующих делитель, к общей точке которого подключен вход сигнала 4, и тракт гетеродина, образованный четвертьволновой двухпроводной линией 5, один из проводников которой соединен со входом гетеродина 6, а другой - с корпусом в точке 7, · а также режекторные фильтры 8, настроенные на частоту сигнала и соединенные с выходом промежуточной частоты 9 .The microstrip balanced mixer contains a housing 1, semiconductor diodes 2, a signal path made in the form of two quarter-wave lines 3, forming a divider, to the common point of which a signal input 4 is connected, and a local oscillator path formed by a quarter-wave two-wire line 5, one of the conductors of which is connected to the input of the local oscillator 6, and the other with the housing at point 7, · as well as notch filters 8, tuned to the frequency of the signal and connected to the output of the intermediate frequency 9.

Устройство работает следующим образом.The device operates as follows.

Мощность СВЧ сигнала, поступая на вход сигнала 4, делится пополам в центре четвертьволновой линии 3 и поступает'в фазе на полупроводниковые дисухы 2. Сигнал гетеродин^ через вход гетеродина 6 и четвертьволновую двухпроводную Линию 5 поступает так- 5 ise на полупроводниковые диоды 2 в противофазе. Преобразованный сигнал через режекторные фильтры 8 поступает на выход устройства.The power of the microwave signal, arriving at the input of signal 4, is divided in half in the center of the quarter-wave line 3 and supplied in phase to the semiconductor dysukha 2. The signal of the local oscillator ^ through the input of the local oscillator 6 and the quarter-wave two-wire Line 5 goes so 5 ise to semiconductor diodes 2 in antiphase . The converted signal through the notch filters 8 is fed to the output of the device.

Балансные свойства микрополоско- Ю вого балансного смесителя обеспечиваются условиями подавления синфазного колебания в четвертьволновых двухпроводных линиях 5. Эти условия легко вывести из предположения,что зазем-15 ленные проводники микрополосковой линии мало влияют на электродинамические свойства двух параллельных линий на диэлектрической подложке, сос.тавляющих двухпроводную линию 20 где Z - сопротивление нагрузки; .The balance properties of the microstrip balanced mixer are ensured by the conditions for suppressing in-phase oscillations in quarter-wave two-wire lines 5. These conditions can easily be deduced from the assumption that the ground-conductive conductors of the microstrip line have little effect on the electrodynamic properties of two parallel lines on a dielectric substrate, which comprise a two-wire line 20 where Z is the load resistance; .

- длина двухпроводной линии; 25- the length of the two-wire line; 25

L^. ; с£ - погонная индуктивность и погонная емкость для синфазного типа колебаний.L ^. ; with £ - linear inductance and linear capacitance for the in-phase type of oscillations.

Α=ν· Mtrer ' ³⁰ Α = ν · Mtrer ^'30

Первое условие определяет наименьшую допустимую длину линий и соответственно нижнюю границу по частоте. Второе условий ограничивает длину ли-35 ,нии и частоту сверху. Размеры предлагаемого устройства равны приблизительно половине длины волны сигнала в направлении распространения колебания, а в перпендикулярном направлении определяются размерами полупроводниковых диодов 2.The first condition determines the smallest permissible length of lines and, accordingly, the lower boundary in frequency. The second condition limits the length of the Li-35, nii and frequency from above. The dimensions of the proposed device are approximately half the wavelength of the signal in the direction of propagation of the oscillations, and in the perpendicular direction are determined by the dimensions of the semiconductor diodes 2.

Полоса пропускания предлагаемого устройства в несколько раз превышает полосу пропускания известного.The bandwidth of the proposed device is several times higher than the known bandwidth.

Таким образом, предлагаемое устройство может найти широкое применение при разработке миниатюрных сверхширокополосных радиоприемных устройств СВЧ диапазона.Thus, the proposed device can be widely used in the development of miniature ultra-wideband microwave receivers.

Claims

The invention relates to radio engineering and can be used in microwave receiving devices. A microstrip balanced mixer incorporating a housing and semi-conductor diodes, to the same electrodes of which are connected the signal paths and the local oscillator with the signal inputs and the heterodyne, and the notches are connected to the other electrodes. filters tuned to the frequency of the signal and connected to the output of the intermediate frequency TI. However, the known device is complicated and has a sufficiently large size, which leads to the fulfillment of the conditions for the occurrence and further propagation of waves of type ot H (, f, and oi-EdP, which creates additional losses. The purpose of the invention is to reduce the size and simplify the device. This is achieved by the fact that in a well-known microstrip balance mixer, comprising a housing and semiconductor diodes, to the same electrodes of which the signal paths and the local oscillator with the signal and heterodyne inputs are connected, and to the other electrodes - blacktop filters tuned to the signal frequency and connected to the intermediate frequency output, the signal path is made in the form of two quarter-wave lines forming a divider, to the common point of which the signal input is connected, and the heterodyne path is made in the form of a quarter-wave two-wire line, one of the conductors of which is connected to the input the heterodyne, and the other - the housing. In Fig. 1 and 2 shows the design of the proposed device. The microstrip balanced mixer includes a housing 1, semiconductor. kovye diodes 2, the signal path, made in the form of two quarter-wave lines 3, forming a divider, the common point of which is connected to the input signal 4, and the heterodyne path formed by the quarter-wave two-wire line 5, one of the conductors of which is connected to the input of the local oscillator b, and the other - with the housing at point 7, as well as notch filters 8, tuned to the signal frequency and connected to the output of the intermediate frequency 9. The device operates as follows. . The power of the microwave signal received at the input of signal 4 is halved in the center of the quarter-wave line 3 and supplied to the phase on semiconductor diodes 2. The local oscillator signal through the input of the local oscillator 6 and the quarter-wave two-wire line 5 goes to semiconductor diodes 2 in antiphase. The converted signal through notch filters 8 is fed to the output device. The balance properties of a microstrip balanced mixer are provided by the suppression of the common mode oscillations in the quarter-wave two wire lines 5. These conditions can be easily inferred from the assumption that the ground conductors of the microstrip line have little effect on the electrodynamic properties of two parallel lines on the dielectric substrate, co. labeled two-wire line 10Sh-o., a "; bc-e. Z - load resistance; . 1 - the length of the two-wire line; ; ci is the linear inductance and the linear capacitance for the type of oscillations. V c - fL-c The first condition determines the least allowable length of the lines and, accordingly, the lower limit in frequency. The second condition limits the length of l. Scientific research institute and frequency from above. The dimensions of the device proposed are equal to about half the wavelength of the signal to the direction of propagation of the oscillations, and in the perpendicular direction are determined by the dimensions of the semiconductor diodes.

2. The bandwidth of the proposed device is several times higher than the OLOS bandwidth of the known. Thus, the proposed device can be widely used in the development of miniature ultra-wideband radio receivers of the microwave range. Claims of the invention A microstrip balanced junction containing a housing and semiconductor diodes, to the same electrodes of which the signal paths and are connected. a local oscillator with signal inputs and a local oscillator; and other electrodes are connected to notch filters tuned to the signal frequency and connected to the intermediate frequency output, characterized in that in order to reduce the size and simplify the device, the signal path is made in the form of two quarter-wave lines forming the divider, to the common point of which the signal input is connected, and the heterodyne path is made in the form of a quarter-wave two-wire line, one of the conductors of which is connected to the input of the local oscillator, and the other with the case. Information about information taken into account in the examination. 1. Elektronics Letters. 1976, V. 12, No. 8, p. 204 (prototype).