CN103401051A - Broadband power synthesizer based on radial line and substrate integrated waveguide - Google Patents
Broadband power synthesizer based on radial line and substrate integrated waveguide Download PDFInfo
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Abstract
The invention discloses a broadband power synthesizer based on a radial line and substrate integrated waveguide, and belongs to the technical field of microwave/millimeter-wave devices. The broadband power synthesizer comprises two power dividing structures which are arranged in a back-to-back manner, and four vertical connectors for connecting the power dividing structures. A coaxial-radial line conversion structures of the power dividing structures convert the input signals into a radial line mode from a coaxial line mode through broadband matching , and transmit the input signals to four full mode-half mode substrate integrated waveguide power dividers in a constant amplitude same phase manner; the four full mode-half mode substrate integrated waveguide power dividers divide the signals into eight ways, and output the signals to eight output microstrip lines through a graded microstrip line segment, and further are connected to the four vertical connectors to enable the signals subjected to synthesis to be output in one way through the power dividing structures below the vertical connectors. The broadband power synthesizer has the characteristics of broad frequency band, less insertion loss, excellent electric conduction and heat dissipation performance, small circuit space coupling and easiness in integration with the planar circuit, and is suitable for synthesis of large power singles.
Description
Technical field
The present invention relates to microwave/millimeter wave device technology field, relate in particular to a kind of wide band radio-frequency (RF) power combiner based on radial transmission line and substrate integration wave-guide.The present invention is applied to microwave telecommunication system, can effectively improve output power of transmitter, increases the wireless signal coverage.
Background technology
In the numerous areas such as wireless communication system, radar system, communication jamming system, remote sensing telemetry system, power amplifier is as the final stage output device in transmitter, and the coverage that its output power levels has directly determined transmitter signal is power system capacity even.Along with the frequency range of application is expanded to microwave and millimeter wave frequency band, the power output of single solid state device often can not meet the demands.Therefore, be necessary the power output of a plurality of devices is synthesized, thereby obtain required power level.
Academia conducts extensive research power combiner.Wherein, based on the power combiner of metal rectangular waveguide, has a loss little, the advantage that power capacity is large.But this circuit cost is higher and be difficult to carry out integrated with the plane active device.On the other hand, although based on micro-power synthesis circuit with the class planar transmission line be easy to be connected with the active power device and cost of manufacture low, but because it is the guided wave structure formed of a kind of semi-open type, loss is large, radiation is stronger, combined coefficient is low, thereby has limited this application of class combiner circuit in the microwave high-frequency section.In recent years; substrate integration wave-guide (SIW) and half module substrate integrated wave guide (HMSIW) are proposed in succession as novel microwave millimeter-wave planar transmission line; because it combines the plurality of advantages of metal waveguide and planar transmission line, increasing Chinese scholars is used for microwave and millimeter wave power study on the synthesis by technique.But in the application scenario of multi-path power divider/mixer, the SIW/HMSIW mixer combined coefficient of tree is still lower, and the SIW/HMSIW mixer bandwidth of pectinate texture and resonance structure is narrower.The basic reason of Bandwidth-Constrained is that the phase difference between each port of SIW/HMSIW output is relevant with frequency.In fact, this problem all exists in the mixer based on the normal transmission line.In order to address this problem, there is the scholar to propose the mixer based on the radial structure transmission line, because this circuit structure has rotational symmetric characteristics, so export the degree of balance and the frequency-independent of each port amplitude-phase, can effectively improve the bandwidth of power combiner.
When the design power synthesizer, also to consider how to take full advantage of the space of heat dissipation metal structure, many major issues such as position of power tube.For example, when synthetic power was very large, too compact combiner structure can cause the Space Coupling of the smooth and active device of heat radiation on the contrary, has a strong impact on synthetic effect.Therefore, design broadband, low-loss and have the power divider/mixer of good radiating structure, still tool is of great significance.
Summary of the invention
In order to improve the power output of microwave telecommunication system, enlarge the coverage that transmits, the invention provides a kind of synthesizer of broadband power based on radial transmission line and substrate integration wave-guide, and have bandwidth, insertion loss is low, manufacture is simple, be easy to the advantages such as and perfect heat-dissipating integrated with planar circuit.
For achieving the above object, the present invention adopts following technical scheme:
A kind of synthesizer of broadband power based on radial transmission line and substrate integration wave-guide, comprise that two merit separation structures that arrange back-to-back are connected the vertical connector of merit separation structure with at least one;
The merit separation structure comprises coaxially-radial transmission line transformational structure, full mould-half module substrate integrated wave guide power splitter, gradation type microstrip transition section and output microstrip line; In coaxially-radial transmission line transformational structure, coaxial line comprises inner wire and outer conductor wall, and the outer conductor wall is fixed on dielectric substrate; Dielectric substrate is provided with central through hole, between inner wire and central through hole, is provided with the coupling paster, and the bottom of the downward connecting media substrate of central through hole covers copper; Outer conductor wall bottom is provided with the cylinder air cavity that is in the same center line with central through hole, inner wire extends in cylinder air cavity, cylinder air cavity covers copper with the dielectric substrate, the bottom that are positioned at its below, and the outer conductor wall of the side of being located thereon forms radial transmission line; Full mould-half module substrate integrated wave guide power splitter comprises gradation type substrate integration wave-guide, substrate integration wave-guide and symmetrical two-way half module substrate integrated wave guide, one end of substrate integration wave-guide is connected with radial transmission line by the gradation type substrate integration wave-guide, the other end blocks as the symmetrical half module substrate integrated wave guide of two-way, and the output signal of each road half module substrate integrated wave guide exports on an output microstrip line through gradation type microstrip line section;
Vertical connector comprises two vertical microstrip lines, and every vertical microstrip line one end is connected with the output microstrip line of one of them merit separation structure, and the other end is connected with the output microstrip line of another merit separation structure; Vertical microstrip line is provided with amplifier.
Further, each merit separation structure can be used as power splitter and uses separately, and the number of the full mould of each merit separation structure-half module substrate integrated wave guide power splitter is four, and the number of each merit separation structure output microstrip line is eight, and the number of vertical connector is four.
Input signal delivers to coaxially-the radial transmission line transformational structure after, by transverse electro-magnetic wave (hereinafter to be referred as TEM) transmission mode, by the Stepped Impedance converter that coaxial inner conductor and central through hole form, be converted to the radial transmission line pattern, to the surrounding radial propagation.Because the internal-and external diameter size of coaxial line is standard value, therefore by regulating the diameter of central through hole and coupling paster, and height and the diameter of cylinder air cavity, can obtain Broadband Matching between the coaxial line of input and radial transmission line.The radial transmission line mode signal passes through gradation type substrate integration wave-guide section Broadband Matching to the TE10 pattern; and the constant amplitude homophase transfer to four full mould-half module substrate integrated wave guide power splitters; the eight road signals that further are divided into the constant amplitude homophase; eight road signals amplify by the merit separation structure of oppositely installing and synthesize a road signal by amplifier separately on vertical microstrip line, finally the coaxial line at the merit separation structure of oppositely installing is reduced to the output of TEM transmission mode.
Further, this power combiner overall structure is about the central point Rotational Symmetry, and the merit separation structure is exported amplitude balance and phase balance and the frequency-independent between each road signal, thereby has increased bandwidth of operation.Two merit separation structures and four vertical connectors are symmetrically distributed in each surface of metallic heat dissipating part.Two merit separation structures and four vertical connectors are distributed in each surface of metallic heat dissipating part, can save heat-dissipating space, are uniformly distributed thermal source, reduce the Space Coupling between coplanar circuit, improve the stability of system.
Further, Duan Yousi plated-through hole of gradation type substrate integration wave-guide forms, and the angle of the line between adjacent two through hole and horizontal direction and vertical direction is 45 degree.Regulate the spacing of plated-through hole, can between radial transmission line and substrate integration wave-guide, obtain Broadband Matching, can also guarantee the rotational symmetric coupling bandwidth that increases simultaneously of structure.
Further, two are provided with metallic heat dissipating part between symmetrically arranged merit separation structure back-to-back; It is the seamless ground connection Copper Foil of a monoblock that bottom covers copper; The top layer of outer conductor wall and dielectric substrate covers copper, bottom covers copper and metallic heat dissipating part all keeps seamless close contact by screw, guarantees good conduction and heat dispersion.
Further, substrate integration wave-guide by top layer cover copper, bottom covers copper and plated-through hole forms through ordinary printed circuit board processes.
Further, vertical connector is fixed by screws in the heat dissipation metal body side surface, and every vertical microstrip line two ends are connected with the output microstrip line of two merit separation structure homonymies respectively.The output microstrip line directly is connected with the vertical microstrip line with same impedance on vertical connector, by adjustment, exports the length of microstrip line oblique line part, can change the spacing of adjacent vertical microstrip line to adapt to different working frequency range and power amplifier size.
In addition, the output signal of each road half module substrate integrated wave guide exports on an output microstrip line through gradation type microstrip line section, and adjusts the angle between adjacent gradation type microstrip line section, can reduce the degree of coupling between adjacent micro-port.Simultaneously, regulate width and the length of gradation type microstrip line section, can between half module substrate integrated wave guide and output microstrip line, obtain Broadband Matching.
Further; on gap between the two-way half module substrate integrated wave guide, be welded with isolation resistance; regulate the gap width between size, position and the two-way half module substrate integrated wave guide of this isolation resistance, can be in the isolation that guarantees between adjacent port optimized transmission and reflection characteristic.
Further, the diameter of central through hole is different from the diameter of coaxial inner conductor, forms the stepped impedance coupling, by the TEM transport mode translations of input coaxial line, is the radial transmission line pattern.
Beneficial effect: (1) the present invention has adopted radial transmission line combined base integrated waveguide and half module substrate integrated wave guide, can when guaranteeing each road constant amplitude homophase of output, increase the way of output signal, be conducive to integrated more power amplifier, increase power output; (2) structure of the present invention is Rotational Symmetry, thereby makes to export amplitude balance and phase balance and frequency-independent between each road signal, thereby has increased bandwidth of operation; (3) each several part of the present invention connect in conjunction with technology such as the conversion of coaxial line Stepped Impedance, coupling paster, gradation type substrate integration wave-guide and gradation type microstrip lines, can in broadband, obtain good return loss characteristic, thereby guarantee effective transmission, the distribution and synthetic of signal in broadband; (4) hop of signal of the present invention has adopted substrate integration wave-guide and half module substrate integrated wave guide, can obtain than the lower insertion loss of conventional planar microstrip type transfers line, thereby increase combined coefficient; (5) between two power dividers in power combiner provided by the invention, with vertical micro-band, directly connect, need not anyly change, power amplifier can be placed on vertical microstrip line, thereby makes this power combiner be conducive to integrated with active circuit; (6) power combiner provided by the invention takes full advantage of each surface of metallic heat dissipating part, has saved heat-dissipating space, the installation site of each power amplifier module spatially is uniformly distributed, and being uniformly distributed of thermal source is conducive to integral heat sink; (7) position of the synthetic and distributor circuit in the installation site of each power amplifier module of power combiner provided by the invention, power all not at grade, is conducive to reduce the Space Coupling between power amplifier, guarantees the stability of system.
The accompanying drawing explanation
Fig. 1 is broadband power synthesizer structure chart provided by the invention.
Fig. 2 is T-T ' sectional view in Fig. 1.
Fig. 3 is S-S ' sectional view in Fig. 1.
Fig. 4 be merit separation structure provided by the invention while as power divider, using separately transmission characteristic and the test result of reflection characteristic.
Fig. 5 is the transmission characteristic of broadband power synthesizer provided by the invention and the test result of reflection characteristic.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
The effect of power distributor/synthesizer is input signal is required to distribute according to certain amplitude and phase place, as shown in Figure 1, the broadband power synthesizer based on radial transmission line and substrate integration wave-guide of the present invention comprise two back-to-back symmetrically arranged merit separation structure A with four, be connected the vertical connector B of merit separation structure A.Wherein, each merit separation structure A is comprised of three parts.First is coaxial-radial transmission line transformational structure 10, and second portion is four full mould-half module substrate integrated wave guide power splitters 8, and third part is eight gradation type microstrip transition sections 19 and output microstrip line 20; Merit separation structure A is divided into input signal 8 road signals of constant amplitude homophase, and each merit separation structure A can design separately and independently use as power splitter.Vertical connector B comprises two vertical microstrip lines 21; All structures are Rotational Symmetry about central point.
In this example, input signal is from 50 ohm of SMA coaxial fittings of standard, transfer to coaxial-radial transmission line transformational structure 10, this coaxial line forms by outer conductor wall 4 with inner wire 11, exist as shown in Figure 2, outer conductor wall 4 is fixing by screw 6, and with the top layer of dielectric substrate 7, covers copper 1 and keep good electric heating to contact.Dielectric substrate 7 is selected the TLX-8 of Taconic, and dielectric constant is 2.55, and thickness is 1.524mm.
In coaxially-radial transmission line transformational structure 10, input signal is converted to the radial transmission line pattern by the TEM transmission mode of coaxial line by the Stepped Impedance converter that coaxial inner conductor 11 and central through hole 14 form.Central through hole 14 is positioned at dielectric substrate 7, and connects bottom downwards and cover copper 2.It is the seamless ground connection Copper Foil of a monoblock that bottom covers copper 2.Between inner wire 11 and central through hole 14, namely the surface of dielectric substrate 7, be designed with coupling paster 13.Externally conductor wall 4 carries out machining, forms cylinder air cavity 12.This cavity covers copper 2 with the dielectric substrate 7, the bottom that are positioned at its below, and the outer conductor wall 4 of top has formed radial transmission line 15.Because the internal-and external diameter size of 50 ohm of coaxial lines is standard value, therefore by regulating the diameter of central through hole 14 and coupling paster 13, and height and the diameter of cylinder air cavity 12, can obtain Broadband Matching between the coaxial line of input and radial transmission line 15.And on the basis of determining 50 ohm of SMA coaxial fitting sizes, this example is made as perfect match layer (PML) by the end plane of radial transmission line 15, by regulating the diameter of central through hole 14 and coupling paster 13, and the diameter of cylinder air cavity 12 and height, make return loss best performance in broadband of coaxle input end mouth.In this example, coupling paster 13 adopts Copper Foil, and makes its surface that is attached to dielectric substrate 7, and the diameter of coupling paster 13 is 5.3mm, and the diameter of central through hole 14 is 3.4mm.In addition, height and the diameter of cylinder air cavity 12 are respectively 0.5mm and 26mm,
Input signal is by coaxial-radial transmission line transformational structure 10 coaxial inner conductor excitations; be converted to the backward surrounding radial propagation of radial transmission line pattern; the radial transmission line pattern is passed through gradation type substrate integration wave-guide section 9 Broadband Matching to the TE10 pattern; and the constant amplitude homophase transfer to four full mould-half module substrate integrated wave guide power splitters 8, further be divided into eight road signals of constant amplitude homophase.Thereby complete merit separation structure A input signal is required to the function of distributing according to certain amplitude and phase place.
Full mould-half module substrate integrated wave guide power splitter 8 comprises gradation type substrate integration wave-guide section 9, substrate integration wave-guide 16 and two symmetrical half module substrate integrated wave guides 17.The plated-through hole diameter that forms substrate integration wave-guide 16 and half module substrate integrated wave guide 17 is 1mm, and pitch of holes is 1.5mm.Gradation type substrate integration wave-guide section 9 is comprised of four plated-through holes.The angle of the line between adjacent two through hole and horizontal direction (vertical direction) is 45 degree, the rotational symmetric coupling bandwidth that increases simultaneously of structure can guaranteed like this, regulate the length (being the spacing of plated-through hole) of gradation type substrate integration wave-guide section 9, can improve and optimize transmission and reflection characteristic in broadband.In this example, the spacing of gradation type substrate integration wave-guide section 9 plated-through holes is 1.1mm.Substrate integration wave-guide 16 is covered copper 1, is connect that bottom covers copper 2 and plated-through hole 3 forms through ordinary printed circuit board processes by top layer.By at top layer, covering etching open circuit gap on copper 1, form two half module substrate integrated wave guides 17.Owing to cracking, do not affect TE
10The field distribution of pattern, therefore this power splitter itself is exactly broadband.Welding isolation resistance 18 on the gap between two-way half module substrate integrated wave guide 17.Regulate the gap width between size, position and the two-way half module substrate integrated wave guide 17 of isolation resistance 18, can be in the isolation that guarantees between adjacent port optimized transmission and reflection characteristic.In this example, isolation resistance 18 is 100 ohm, apart from the gap terminal, is 6.7mm, and the gap width between two-way half module substrate integrated wave guide 17 is 0.4mm.
The output signal of each road half module substrate integrated wave guide 17 is through gradation type microstrip line section 19 and export output microstrip line 20 to.Adjust the angle between adjacent gradation type microstrip line section 19, can reduce the degree of coupling between adjacent micro-port.Simultaneously, regulate width and the length of gradation type microstrip line section 19, can between half module substrate integrated wave guide 17 and output microstrip line 20, obtain Broadband Matching.Angle in this example between adjacent gradation type microstrip line section 19 is 30 degree, and its length and width are respectively 24mm and 6mm.
Gradation type microstrip line section 19 and output microstrip line 20 employing standard 50 ohm microstrip in this example, and output microstrip line 20 and vertically the vertical microstrip line 21 with same impedance on connector B directly be connected, as shown in Figure 3.Vertical connector B is fixed on the side of metallic heat dissipating part 5 by screw 6, guarantee good conduction and heat dispersion.Each road signal amplifies by amplifier separately the merit separation structure A that oppositely installs by bottom and synthesizes a road signal on vertical microstrip line 21, finally at the Output with coaxial line of bottom.What need particularly point out is, by adjustment, exports the length of microstrip line 20 oblique lines parts, can change the spacing of adjacent vertical microstrip line 21 to adapt to different working frequency range and power amplifier size.
In this example at first the single mode propagation condition according to substrate integration wave-guide 16 design its width; then a full mould-half module substrate integrated wave guide power splitter 8 is connected to two-way gradation type microstrip line section 19 and output microstrip line 20, and on the gap between two-way half module integrated waveguide 17, weld isolation resistance 18.Regulate the angle between length, width and the adjacent gradation type microstrip line section wide 19 of width, gradation type microstrip line section wide 19 in gap between the size, position, two-way half module integrated waveguide 17 of isolation resistance 18, can be in the isolation that guarantees between adjacent port optimized transmission and reflection characteristic.
Input signal delivers to coaxially-radial transmission line transformational structure 10 after, by the TEM transmission mode, by the Stepped Impedance converter that coaxial inner conductor 11 and central through hole 14 form, be converted to the radial transmission line pattern, to the surrounding radial propagation.Because the internal-and external diameter size of coaxial line is standard value, therefore by regulating the diameter of central through hole 14 and coupling paster 13, and height and the diameter of cylinder air cavity 12, can obtain Broadband Matching between the coaxial line of input and radial transmission line.The radial transmission line mode signal passes through gradation type substrate integration wave-guide section 9 Broadband Matching to TE
10Pattern; and the constant amplitude homophase transfer to four full mould-half module substrate integrated wave guide power splitters 8; the eight road signals that further are divided into the constant amplitude homophase, each road signal flows to the vertical microstrip line 21 with same impedance on vertical connector B through gradation type microstrip line section 19, output microstrip line 20.Eight road signals amplify by the merit separation structure A inverted running of oppositely installing and synthesize a road signal by amplifier separately on vertical microstrip line 21, finally the coaxial line at the merit separation structure A that oppositely installs is reduced to the output of TEM transmission mode.
This example is realized the broadband power synthesizer based on radial transmission line and substrate integration wave-guide in the 4.5GHz-11GHz frequency range, and tests its overall performance in the 3GHz-13GHz frequency range.At first single merit separation structure A device is tested.But the power division of these structure complete independently eight road signals.Because all of the port is Rotational Symmetry, thus transmission coefficient and the reflection coefficient from input port to arbitrary output microstrip line 20 ports of merit separation structure A only need be tested, as shown in Figure 4.Insertion loss integral body is lower than 1dB in the frequency band range of 4.5GHz to 11.2GHz, and minimum value is 0.4dB.Return loss is better than-12dB.The result of this test has comprised the loss of output port sub-miniature A connector.
With four vertical connector B, above-mentioned a pair of merit separation structure A is done to connect back-to-back, form a two-port network.The test result of this network as shown in Figure 5.In the frequency band of 4.8GHz to 11GHz, the insertion loss maximum is 1.9dB, and minimum value is 0.9dB.Return loss is better than-10dB.
It is only below the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. the synthesizer of the broadband power based on radial transmission line and substrate integration wave-guide, is characterized in that: comprise that two merit separation structures that arrange back-to-back are connected the vertical connector of merit separation structure with at least one;
Described merit separation structure comprises coaxially-radial transmission line transformational structure (10), full mould-half module substrate integrated wave guide power splitter (8), gradation type microstrip transition section (19) and export microstrip line (20); Described coaxial-radial transmission line transformational structure (10) in coaxial line comprise inner wire (11) and outer conductor wall (4), described outer conductor wall (4) is fixed on dielectric substrate (7); Described dielectric substrate (7) is provided with central through hole (14), between described inner wire (11) and central through hole (14), is provided with coupling paster (13), and described central through hole (14) connects bottom downwards and covers copper (2); Described outer conductor wall (4) bottom is provided with cylinder air cavity (12), described inner wire (11) extends in cylinder air cavity (12), described cylinder air cavity (12) and the dielectric substrate (7), the bottom that are positioned at its below cover copper (2), and the outer conductor wall (4) of the side of being located thereon forms radial transmission line (15); Described full mould-half module substrate integrated wave guide power splitter (8) comprises gradation type substrate integration wave-guide (9), substrate integration wave-guide (16) and symmetrical two-way half module substrate integrated wave guide (17), one end of described substrate integration wave-guide (16) is connected with radial transmission line (15) by gradation type substrate integration wave-guide (9), the other end blocks as the symmetrical half module substrate integrated wave guide of two-way (17), and the output signal of each road half module substrate integrated wave guide (17) exports on an output microstrip line (20) through gradation type microstrip line section (19);
Described vertical connector comprises two vertical microstrip lines (21), and every vertical microstrip line (21) one ends are connected with the output microstrip line (20) of one of them merit separation structure, and the other end is connected with the output microstrip line (20) of another merit separation structure; Described vertical microstrip line (21) is provided with amplifier.
2. a kind of synthesizer of broadband power based on radial transmission line and substrate integration wave-guide according to claim 1; it is characterized in that: the number of described full mould-half module substrate integrated wave guide power splitter (8) is four; the number of each merit separation structure output microstrip line (20) is eight, and the number of described vertical connector is four.
3. a kind of synthesizer of broadband power based on radial transmission line and substrate integration wave-guide according to claim 1, it is characterized in that: described two are provided with metallic heat dissipating part (5) back-to-back between symmetrically arranged merit separation structure; It is the seamless ground connection Copper Foil of a monoblock that described bottom covers copper (2); Described outer conductor wall (4) covers copper (1) with the top layer of dielectric substrate (7), bottom covers copper (2) and all by screw (6), keeps seamless close contact with metallic heat dissipating part (5).
4. according to claim 2 or 3 described a kind of synthesizers of broadband power based on radial transmission line and substrate integration wave-guide, it is characterized in that: this power combiner is about the central point Rotational Symmetry; Described two merit separation structures and four vertical connectors are symmetrically distributed in each surface of metallic heat dissipating part (5).
5. a kind of synthesizer of broadband power based on radial transmission line and substrate integration wave-guide according to claim 1, it is characterized in that: described gradation type substrate integration wave-guide section (9) is comprised of four plated-through holes (3), and the angle of the line between adjacent two through hole and horizontal direction and vertical direction is 45 degree.
6. according to claim 3 or 5 described a kind of synthesizers of broadband power based on radial transmission line and substrate integration wave-guide is characterized in that: described substrate integration wave-guide (16) by top layer cover copper (1), bottom covers copper (2) and plated-through hole (3) forms through ordinary printed circuit board processes.
7. a kind of synthesizer of broadband power based on radial transmission line and substrate integration wave-guide according to claim 1, it is characterized in that: described vertical connector is fixed on metallic heat dissipating part (5) side by screw (6), and every vertical microstrip line (21) two ends are connected with the output microstrip line (20) of two merit separation structure homonymies respectively.
8. a kind of synthesizer of broadband power based on radial transmission line and substrate integration wave-guide according to claim 1, is characterized in that: on the gap between described two-way half module substrate integrated wave guide (17), be welded with isolation resistance (18).
9. a kind of synthesizer of broadband power based on radial transmission line and substrate integration wave-guide according to claim 1, it is characterized in that: the diameter of described central through hole (14) is different from the diameter of coaxial inner conductor (11).
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Cited By (3)
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| CN112054275A (en) * | 2020-08-20 | 2020-12-08 | 东南大学 | Low-loss switching device of substrate integrated waveguide end feed antenna |
| CN114709580A (en) * | 2022-01-14 | 2022-07-05 | 南京恒讯微波科技有限公司 | Transmission circuit with accurate debugging function |
| CN115313007A (en) * | 2022-04-12 | 2022-11-08 | 河北军澍电子科技有限公司 | Ultra-wideband miniaturized microstrip power divider |
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| CN112054275A (en) * | 2020-08-20 | 2020-12-08 | 东南大学 | Low-loss switching device of substrate integrated waveguide end feed antenna |
| CN114709580A (en) * | 2022-01-14 | 2022-07-05 | 南京恒讯微波科技有限公司 | Transmission circuit with accurate debugging function |
| CN115313007A (en) * | 2022-04-12 | 2022-11-08 | 河北军澍电子科技有限公司 | Ultra-wideband miniaturized microstrip power divider |
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