236 results about "Wilkinson power divider" patented technology

An integrated N-way Wilkinson power divider is described. In one embodiment, the N-way Wilkinson power divider uses a conductor layer with a cross-over (or cross-under) resistor insulated from the conducting layer by an insulating bridge. In one embodiment, the width of the transmission line underneath a cross-over resistor is adjusted to improve performance In one embodiment, a three-way Wilkinson power divider is formed using microstrip transmission lines on a single-layer substrate that supports the microstrip transmission lines, dielectric insulators, and resistors.

The invention discloses a dual-polarized multi-system compatible antenna which comprises an upper-layer circular capacitance loading metal patch, a monopole metal column, an upper-layer medium baseplate, a first short-circuit pin, a second short-circuit pin, an annular metal patch, an intermediate-layer first medium baseplate, L-shaped probes, an intermediate-layer second medium baseplate, a metal floor, a bottom-layer medium baseplate and a bottom-layer Wilkinson power divider, wherein the Wilkinson power divider is connected with the two L-shaped probes which are orthogonal mutually for performing coupling feed on the annular metal patch, the outer edge of the annular metal patch is circular, the inner edge of the annular metal patch is elliptical, the ratio of a long shaft to a short shaft of an ellipse is regulated, and then the axial ratio performance of the antenna can be regulated; and the upper-layer circular capacitance loading metal patch, the monopole metal column, the first short-circuit pin and the second short-circuit pin constitute a capacitance and inductance loading monopole antenna by inductance loading, thereby effectively reducing the size of the antenna. The antenna has the characteristics of small size, large axial ratio bandwidth, large impedance bandwidth, compact structure and the like.

The present invention discloses a power divider, wherein a transmission line includes a sub-2 connector, two branch ports of the connector are connected to two output main branches separately, more than two branch lines for communicating the two output main branches are arranged between two output main branches, the branches are designed so that a difference of a sum of a path from a node A to a node B11 and a path from the node A to a node B12, and a path from the node B11 to the node B12 is (Lambadaj/2)*(2p +1) + (Lambadaj/2)*Zeta, and the branches of other nodes are designed so that a difference of a sum of a path from a node Bk1 to a node B(k-1)1 and a path from the node B(k-1)1 to a node B(k-1)2 as well as a path from the node B(k-1)2 to a node Bk2, and a path from the node Bk1 to the node Bk2 is (Lambadai/2)*(2m+1) + (Lambadai/2) * Delta. The output and input of the invention are matched well, there is a good separation between two output ends, and overcomes autoeciousness effects of Wilkinson power divider caused by insulation electric resistances and a problem that a phase of a signal outputted from a directly-connecting end is inconsistent to that of a signal outputted from a coupling end of a branch line electric bridge power divider.

The invention discloses a broadband multi-polarized reconfigurable slot antenna and a polarization method therefor. The broadband multi-polarized reconfigurable slot antenna comprises four layers of dielectric substrates, wherein an elliptical metal patch is arranged on the lower surface of the first layer of dielectric substrate; a first feed structure is arranged on the upper surface of the second layer of dielectric substrate; a metal layer is arranged on the upper surface of the third layer of dielectric substrate; a quasi-cross-shaped slot is formed in the metal layer; a second feed structure is arranged on the upper surface of the fourth layer of dielectric substrate; and a reconfigurable wilkinson power divider is arranged on the lower surface of the fourth layer of dielectric substrate. The linear polarization radiation state with ultrahigh port isolation in two vertical directions can be achieved through a quasi-cross-shaped slot antenna fed through the first feed structure and the second feed structure; the wilkinson power divider conducts different paths through pin diodes and is connected with the first feed structure and the second feed structure through a plated through hole, so that five different antenna polarization modes of -45-degree linear polarization, 45-degree linear polarization, +/-45-degree dual-linear polarization, left-hand circular polarization andright-hand circular polarization can be achieved, the relative bandwidth is close to 20%, and the broadband multi-polarized reconfigurable slot antenna fully adapts to different work requirements.

The invention discloses a left-right hand circular polarization reconstructible micro-strip travelling wave antenna array, and belongs to the antenna technical field; the left-right hand circular polarization reconstructible micro-strip travelling wave antenna array uses a conventional square corner cut circular polarization micro-strip antenna structure as a base, considers impedance match characteristics between array elements, employs a cascade mode to connected the sub-array elements, thus forming the micro-strip travelling wave antenna array, and further using a switch control feed network feed mode to reach a left-right hand circular polarization reconstructible purpose. The micro-strip travelling wave antenna array, a Wilkinson power divider and the circular polarization technology are combined, so low profile, low cost and low cross polarization characteristics of a tradition circular polarization micro-strip paster antenna can be inherited, and broadband and high gain advantages can be added; the left-right hand circular polarization reconstructible micro-strip travelling wave antenna array is applied to the radar and communication systems like an aircraft, a ship, and a vehicle device.

The invention relates to an ultra-wide-band Wilkinson power divider, which comprises a dielectric layer, a signal metal layer attached to one side of the dielectric layer, and a metal bottom layer attached to the other side of the dielectric layer. The signal metal layer comprises a microwave transmission branch and a microstrip line expansion structure, wherein the microwave transmission branch is used for dividing a path of microwave signal into multiple paths of microwave branch signals for output; and the microstrip line expansion structure is composed of microstrip lines, one end of the microstrip line expansion structure is connected to the microwave transmission branch, the other end is suspended, the length of each microstrip line is 1/4 of central wavelength of microwaves of the ultra-wide-band Wilkinson power divider, and the microstrip line expansion structure is used for increasing polar points of the Wilkinson power divider. Through arranging the microstrip line expansion structure on the microwave transmission branch of the Wilkinson power divider, the polar points of the Wilkinson power divider are increased, and the frequency band thereof can be broadened, thereby acquiring the ultra-wide-band Wilkinson power divider with a simple structure.

The invention discloses a multi-frequency wide-beam circular polarization antenna, which comprises a high-frequency band circular polarization antenna, a low-frequency band circular polarization antenna, an intermediate medium plate and a feed network which are coaxially overlaid sequentially from top to bottom , wherein the high-frequency band circular polarization antenna adopts a structure that a plurality of reversed L-shaped array antennae are uniformly arranged on the intermediate medium plate along a circumference; the low-frequency band circular polarization antenna adopts a structure that a plurality of PIFAs (Planar Inverted F Antennae) are uniformly arranged on the intermediate medium plate along the circumference; and the feed network is composed of two medium plates which are soldered together, and Wilkinson power dividers used for giving feed to the reversed L-shaped array antennae and the PIFAs are respectively printed on the medium plates. By utilizing the circular polarization principles of the PIFAs and the array antennae, the multi-frequency wide-beam circular polarization antenna which can work in the frequency of 1.1-1.7 GHz (low-frequency band) and 2.2-2.8 GHz (high-frequency band) is designed, the directional pattern of the antenna has a wide-beam characteristic, the out-of-roundness feature of the pattern is good through a coaxial overlaying design, and the upper half space can be covered well.

A power divider for a Wilkinson power divider includes a dielectric layer arranged at a lower part of the Wilkinson power divider and composed of at least one composite material: and a first composite right/left handed (CRLH) transmission line connected in series between the transformer line and the first output line. Further, the power divider for the Wilkinson power divider includes a second CRLH transmission line connected in series between the transformer line and the second output line.

A radar sensor emits microwave radiation and receives partial radiation reflected at objects within the sensor detection range, a plurality of antennas being provided for the transmission and reception in each case, and the transmission power of the outer antennas being lower than the transmission power of the inner antennas. This is accomplished by reducing the transmission power with the aid of couplers, the couplers advantageously being implementable as Wilkinson power splitters.

The invention discloses a tri-band Wilkinson power distributor. The distributor comprises a dual-frequency Wilkinson power distributor, wherein three ports of the dual-frequency Wilkinson power distributor are provided with an impedance converter respectively; and the impedance converter is used for realizing operation of the tri-band Wilkinson power distributor. The distributor of the invention can realize the operation of the tri-band Wilkinson power distributor, has the advantages of low cost, simple structure and the like, and can work under three controllable frequency bands to fulfill the requirement of multi-frequency work of modern wireless communication.

The invention discloses a miniaturized phase shifting equalizer based on a Wilkinson power divider. The miniaturized phase shifting equalizer comprises a microstrip circuit layer, a medium layer and a metal stratum which are sequentially overlaid from the top to the bottom, wherein the microstrip circuit layer comprises an unequal Wilkinson power divider, a microstrip phase shifting line, an unequal Wilkinson power combiner and a matched microstrip connecting line; the unequal Wilkinson power divider and the unequal Wilkinson power combiner are connected with the matched microstrip connecting line through the microstrip phase shifting line. The miniaturized phase shifting equalizer has the advantages of simple structure, small size, large equilibrium quantity, novel structure and good standing wave property.

The invention discloses a feeding network layer and an antenna system. The feeding network layer comprises two feeding networks in mutual mirror symmetry, and each feeding network comprises a feeding input port, a Wilkinson power divider, a slow-wave line structure, aSchiffman phase shifter, and a branch-line directional coupler. The antenna system comprises the feeding network layer, a second dielectric substrate layer, a metal ground layer, a first dielectric substrate layer, and a radiation layer laminated in sequence from bottom to top. The invention also discloses a method for generating four polarization modes of the antenna system, wherein the four polarization modes comprise left-hand circular polarization, right-hand circular polarization, +45-degree linear polarization, and -45-degree linear polarization. According to the feeding network layer, the antenna system, and the method, the design is ingenious, the structure is simple, the defects of unstable structure and high cost caused by realization of the quadri-polarization antenna through change of the physical direction of an antenna oscillator and loading of a radio frequency switch are overcome, and requirements of simple machining of the antenna and easy integration are guaranteed.

The invention relates to a Wilkinson power distributor terminated with arbitrary complex impedors. A single-node coupling microstrip line is adopted for replacing the traditional two-section symmetrical quarter wavelength microstrip line, i.e. a power distribution circuit main body only comprises a coupling microstrip line (Ze, Zo and theta) and an isolation resistor (Rw), and in addition, four calculation formulas of the unique value of four parameters (Ze, Zo, theta and Rw) of the power distributor can be precisely solved by an odd-even mode analytical method only through determining the terminated complex impedors (ZS and ZL) of three input and output ports. After a proper medium plate is selected, various geometric dimensions such as line width, line length and line gap of the single-node coupling microstrip line can be obtained through calculation by a microwave simulation software ADS (advanced design system). The Wilkinson power distributor has the advantages that the device structure is simple and compact, the size is small and exquisite, the integration is easy, the use in dense integrated circuits is convenient, and the problem that the input and output ports of the power distributor are simultaneously connected with the arbitrary complex impedors is solved.

The invention discloses a reconfigurable high-efficiency high-linearity broadband power amplifying method and an amplifier. One output end of an unequal Wilkinson power divider in the amplifier is connected with a carrier power amplifier, and the other output end of the unequal Wilkinson power divider is connected with a peak power amplifier; the carrier power amplifier is connected with one input end of a power combiner through a 1/4 wave length impedance transformer; the output end of the peak power amplifier is connected with the other input end of the power combiner; the input end of the power combiner is connected with a load modulation network; the load modulation network is characterized in that a section of 1/4 wave length transmission line is connected in parallel to the tail of the conventional 1/4 wave length transmission line; and the bandwidth of the conventional Doherty is broadened. According to the amplifying method and the amplifier, drifting of 'effective' load impedance along with operating frequency can be inhibited greatly, so that the broadband of the Doherty amplifier is improved, which provides guarantee for improving the overall broadband of the Doherty amplifier.

The invention discloses a miniaturized triple-band multilayer patch Beidou antenna comprising an upper layer micro-strip antenna, an intermediate layer micro-strip antenna, a lower layer micro-strip antenna and a bottom layer feed network layer which are connected from the top to the bottom in turn in a laminating way, and cross section area of all layers of micro-strip antennas from the top to the bottom increases in turn and thickness of all layers of micro-strip antennas increases in turn. The upper layer micro-strip antenna comprises an upper layer micro-strip patch and an upper layer dielectric substrate. The intermediate layer micro-strip antenna comprises an intermediate layer micro-strip patch and an intermediate layer dielectric substrate. The lower layer micro-strip antenna comprises a lower layer micro-strip patch and a lower layer dielectric substrate. The bottom layer feed network layer comprises a metal earth plate and a bottom layer dielectric substrate. The lower end surface of the bottom layer dielectric substrate is provided with a feed network circuit board. The feed network circuit board comprises a Wilkinson power divider, a micro-strip transmission line and a feed port. The miniaturized triple-band multilayer patch Beidou antenna further comprises a center feed probe, an interlayer feed probe and a short circuit probe. The interlayer feed probe comprises an intermediate layer feed probe and a lower layer feed probe.

The invention discloses a high-efficiency rectifier circuit covering a wide input power range. The rectifier circuit consists of a Wilkinson power divider, a first sub-rectifier circuit and a second sub-rectifier circuit. The Wilkinson power divider has a power ratio of one to two, and provides different input power for the first sub-rectifier circuit and the second sub-rectifier circuit. The first sub-rectifier circuit and the second sub-sub-rectifier obtain optimum rectification efficiencies at different input power. The first sub-rectifier circuit and the second sub-rectifier circuit are combined through the Wilkinson power divider, and the entire rectifier circuit has two power conversion efficiency peak values and is thus allowed to obtain a high rectification efficiency over a wider input power range. Moreover, at the same input power, the rectifier circuit has almost the same or higher efficiency as that of a single sub-rectifier circuit.

The invention provides a Doherty power amplifier capable of improving a power back-off dynamic range and a realization method thereof. The Doherty power amplifier comprises an equal Wilkinson power divider, a carrier power amplification circuit, a peak power amplification circuit, and a novel load modulation network, wherein the equal Wilkinson power divider is used for equally dividing an input power and then outputting the equally-divided input power to the carrier power amplification circuit and the peak power amplification circuit; and the output end of the carrier power amplification circuit is connected with an 86.6 ohm quarter wave-length impedance transformer T1, and is connected with the output end of the peak power amplification circuit and the power is combined to be outputted to the load. Compared with the prior art, the load modulation network of the traditional Doherty power amplifier is improved, and thus, the load impedance of a main power amplifier in a low-input power state is enhanced, and the high-efficiency power back-off range of the Doherty power amplifier is improved.

The invention provides a broadband Doherty power amplifier with continuous inverse class F and class J mixed. The broadband Doherty power amplifier comprises a broadband Wilkinson power divider, a phase compensation line, a carrier power amplification circuit, a peak power amplification circuit and a broadband post-matching circuit. The carrier power amplification circuit comprises a carrier broadband input matching circuit, a carrier amplifier transistor and an impedance converter; the peak power amplification circuit comprises a peak broadband input matching circuit, a peak amplifier transistor, a peak harmonic control/suppression network, a peak fundamental wave tuning network and a reverse phase compensation line; and the broadband post-matching circuit comprises a carrier harmonic control network and a post-matching tuning network. The carrier amplifier works in a continuous inverse class F mode when input power is saturated, works in a class J mode when input power is back-off by 6dB, and the peak amplifier works in a continuous inverse class F mode when input power is saturated and does not work when input power is back-off by 6dB.

Various aspects of the disclosure provide high power and high efficiency power amplifier systems that can be integrated on a chip using integrated circuit processes such as a standard CMOS and SiGe process. A power amplifier system is disclosed according to one aspect. The power amplifier system comprises a first power amplifier, a Wilkinson power splitter, second-stage amplifiers, and a Wilkinson power combiner. The first power amplifier pre-amplifies an RF input signal. The Wilkinson power splitter then splits the power of the amplified RF signal outputted by the first power amplifier among the second-stage amplifiers. Each of the second-stage amplifiers amplifies the respective RF signal from the Wilkinson power splitter. The Wilkinson power combiner then sums the powers of the amplified RF signals outputted by the second-stage amplifiers and outputs the resulting combined RF signal.

The invention discloses an ultra-wide-band horizontally-polarized omnidirectional connection type Vivaldi circular array antenna, and mainly solves the problems of wide frequency band, omnidirectional horizontal polarization and miniaturization of an antenna cannot be satisfied in the prior art. The ultra-wide-band horizontally-polarized omnidirectional connection type Vivaldi circular array antenna comprises a radiation unit (1), a feeding network (2) and a dielectric plate (3), wherein the radiation unit (1) is a 16-element connecting type Vivaldi antenna array which is formed by a Vivaldi unit around a center in a rotating manner; the feeding network (2) adopts a one-into-sixteen broadband Wilkinson power divider and a coupling microstrip feeder line; electromagnetic energy is coupled to the radiation unit through the coupling microstrip feeder line; the dielectric plate (3) adopts a Kangtaini (a Chinese brand name)dielectric plate with a dielectric constant of 2.55; the radiation unit and the feeding network are printed on the upper and lower surfaces of the dielectric plate; and the centers of the radiation unit and the feeding network coincide with that of the dielectric plate. The circular array antenna has the characteristics of ultra wide band, omnidirectional horizontal polarization and miniaturization, and can be used in a full-coverage ultra-wide-band wireless communication system in the peripheral regions.

The invention discloses a broadband low-profile circularly polarized antenna based on asymmetric dipoles. The antenna has a four-layer structure, wherein the first layer is a radiation structure whichis printed on the upper layer of an upper dielectric plate and has a rotational symmetry characteristic, and comprises four asymmetric dipoles, each dipole comprising a long arm on the outer side anda short arm on the inner side; the second layer is of an artificial magnetic conductor structure and comprises two kinds of different sizes of square metal patches which are printed on the upper layer of a middle dielectric plate; the third layer is a floor printed on the upper layer of a lower dielectric plate and a feed network printed on the lower layer of the lower dielectric plate, and comprises a second-order Wilkinson power divider and a 90-degree broadband phase shifter; and the fourth layer is four broadband balun structures printed on a vertical dielectric plate, provides balance feed for the radiation structure, and realizes impedance matching in a broadband. The antenna has the advantages of wide frequency band, low profile, simple structure, gentle in-band gain and the like,and is suitable for the wireless communication fields of electronic countermeasure, radio frequency identification systems, wireless local area networks, global positioning systems and the like.

The invention discloses a sequential phase feed circular polarization dielectric resonant antenna array which is composed of n dielectric resonators, a four-rotation feed network, Wilkinson power distributors, a dielectric substrate, coaxial feeding, metal probes and strip lines. The N dielectric resonators form an array on the dielectric substrate. The feed network is composed of one four-rotation feed network and four one-to-two Wilkinson power distributors which are located on the central back of the dielectric substrate. The coaxially transmitted energy is fed to the two frequency dividersvia the feed network and coupled to the orthogonally arranged strip lines on the side wall of the dielectric resonator by the two metal probes arranged at the output end of the frequency divider. Thearray can realize narrower main lobe radiation pattern width, higher gain, wider impedance bandwidth and axial ratio bandwidth, thereby enabling the antenna to have further excellent and stable circular polarization performance and better meet the index requirements of modern communication technology for the circular polarization communication system.

The invention discloses a dual-frequency dual-circularly polarized microstrip array antenna with wide axial ratio bandwidth. The microstrip array antenna comprises a monolayer microwave dielectric substrate, four dual-frequency linearly polarized radiation patches with working frequencies of f1 and f2, and a dual-frequency shared microstrip power dividing network. Wherein, the dual-frequency linearly polarized radiation patch with the working frequency f1, f2 is uniformly distributed on the circumference with the point O as the center; The dual-frequency shared microstrip power dividing network comprises two Wilkinson power dividers, two dual-frequency shared 90-degree phase shifters composed of microstrip lines, and one dual-frequency shared 180-degree phase shifter. The invention effectively increases the dual-frequency circular polarization axial ratio bandwidth, and can be conveniently expanded into a high-gain array with a larger aperture, adopts a single-layer dielectric plate, and the array element is a single unit, the structure is simple, the profile is low, and realization is easye.