CN107689471A - A kind of Finline switched feed circuits - Google Patents
A kind of Finline switched feed circuits Download PDFInfo
- Publication number
- CN107689471A CN107689471A CN201710624001.7A CN201710624001A CN107689471A CN 107689471 A CN107689471 A CN 107689471A CN 201710624001 A CN201710624001 A CN 201710624001A CN 107689471 A CN107689471 A CN 107689471A
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- CN
- China
- Prior art keywords
- finline
- waveguide
- guide wall
- wave guide
- feed circuits
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/10—Auxiliary devices for switching or interrupting
Landscapes
- Waveguide Switches, Polarizers, And Phase Shifters (AREA)
Abstract
The present invention relates to a kind of Finline switched feed circuits, relative to prior art, first, zigzag minor matters are replaced with into homogeneous metal via；Secondth, fin-line transition the regulation of electrical circuit and wave guide wall are retained into a determining deviation, for optimizing insertion loss and return loss；Design is simple, and circuit performance is excellent.From the point of view of simulation result, signal is less than 40dB in the leakage of feed port.
Description
Technical field
The invention belongs to millimeter-wave technology field, and in particular to the quick high-performance designs of millimeter wave switched feed circuits.
Background technology
The now universal design method of millimeter wave switched feed circuits is to use zigzag minor matters, zigzag branch in feed end
The design of section is the improvement based on traditional fin line structure, and the structure is used to suppress TEM moulds caused by fin line edge, while also to milli
The leakage of metric wave signal has suppression well (should place above minor matters substrate prevent it from contacting upper cavity and short-circuit), this feed
Scheme refers in microwave and millimeter wave forum thunder in 2011 hears " the millimeter wave single-pole double-throw switch (SPDT) " of chapter, other texts both domestic and external
Offer the design for not describing feed circuit either or use this scheme.The program has the obvious disadvantage that.First, zigzag
The size W1, W2 and spacing W3 of minor matters suppress very sensitive for millimeter wave feed end signal.(W1, W2, W3 are shown in Fig. 1 in position).
Prolonged emulation is needed early stage just to can determine that its size, zigzag minor matters can also produce undesirable humorous in waveguide cavity
Vibration frequency, so as to have a strong impact on its index.Second, minor matters top needs placement insulating materials to contact upper cavity ground connection to prevent it,
Insulating materials inherently makes printed board produce nonmetallic gap with waveguide upper cavity, and control is bad to cause microwave signal to be revealed.
The content of the invention
Technical problems to be solved
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of Finline switched feed circuits.
Technical scheme
A kind of Finline switched feed circuits, it is characterised in that including medium substrate, medium substrate is positioned over waveguide
Centre, waveguide being divided into two, medium substrate is divided into 3 parts, the part in two on the outside of wave guide wall part and waveguide,
Wherein wave guide wall side is low pass filter, and low pass filter connection is located at the fin line in waveguide, described fin line and wave guide wall
Certain spacing is left, adjustment spacing is optimal return loss and insertion loss, the poles of PIN bis- are connected between two fin lines
Pipe, metallic vias is provided with two outsides of wave guide wall.
Described low pass filter could alternatively be high resistant line.
Described metallic vias is smaller than quarter-wave.
Beneficial effect
A kind of Finline switched feed circuits proposed by the present invention, design is simple, and circuit performance is excellent.Tied from emulation
From the point of view of fruit, signal is less than -40dB in the leakage of feed port.
Brief description of the drawings
Finline switch feeding scheme traditional Fig. 1
The improved Finline switch feeding schemes of Fig. 2
Fig. 3 artificial stereo figures of the present invention
Fig. 4 feed end signal leakage simulation results
Fig. 5 3mm switch isolation degree simulation results
Fig. 6 3mm switch insertion loss simulation results
Embodiment
In conjunction with embodiment, accompanying drawing, the invention will be further described：
Fig. 1 illustrates traditional Finline switch feeding scheme, and printed board substrate circuit 4 is put into half waveguide up and down
Between, waveguide is divided into two, therein 1 is low pass filter, and 2 be zigzag minor matters, and 3 be wave-guide cavity wave, and 4 be by copper foil structure
Into fin line circuit, 5 be PIN diode, and 6 be printed board substrate, 7 and with the circle of radius be metallic vias with 7.Traditional millimeter
Ripple fin-line switch feeding scheme is a kind of ripe scheme, and its structure is just not repeated with principle, primary object of the invention
And be different from traditional scheme is：Firstth, zigzag minor matters are replaced with into homogeneous metal via, as shown in c in Fig. 2.Cross
Hole placement principle is consistent with non-feeding end via, and this two rows metallization VIA should be close to waveguide cavity edge, and feed chamber will try one's best
It is small, it might even be possible to substitute high low-impedance line wave filter using suitable high resistant line and further reduce feed chamber size；Secondth, by fin
Line transition circuit is adjusted in Fig. 2 shown in h, and D is that fin line circuit causes fin-line transition circuit to wave guide wall distance, the circuit form
H and wave guide wall i, and feed chamber g spatially realize isolation, avoid short circuit.
Equably hole only need to uniformly be placed along wave guide wall edge, and spacing should be less than quarter-wave, and size should
Rationally set according to pitch of holes.Requirements above easily realizes that the used time is also shorter than design zigzag minor matters in design.The program
Realize feed circuit and wave guide wall and feed cavity space on it is completely isolated, avoid in traditional feed circuit zigzag minor matters
The nonmetallic gap of waveguide cavity caused by side need to increase dielectric.And then improve the performance of millimeter wave switch.
The application of a millimeter wave feed circuit is enumerated, has been particularly applicable in a 3mm switch designs, pcb substrate
A selects Rogers 5880, thickness 0.127mm, and standard waveguide is divided into two by the substrate, standard waveguide i, and waveguide broadside is
2.54mm, Narrow Wall of Waveguide side are 1.27mm, as shown in Figure 2.C and the circle consistent with c radius sizes are metallization VIA, and radius is set
For 0.1mm, via and wave guide wall spacing are 0.01mm.Spacing is smaller, and electrical property is better.B manages for PIN.F is high resistant line, line width
0.1mm.G is feed chamber, and size should be as far as possible small, and it is 0.5mm × 0.5mm × 1mm to set size here, and its feed port can lead to
The connectors such as insulator are crossed to switch on power.Power supply accesses high resistant line f, completes power supply.
Because the excellent specific property of feed circuit causes 3mm switches in 90-100GHz scopes it can be seen from simulation result
Interior, isolation is more than 19dB, and differential loss is less than 1.2dB.With good circuit characteristic.
Claims (3)
1. a kind of Finline switched feed circuits, it is characterised in that including medium substrate, medium substrate is positioned in waveguide
Between, waveguide is divided into two, medium substrate is divided into 3 parts, the part in two on the outside of wave guide wall part and waveguide, its
Middle wave guide wall side is low pass filter, and low pass filter connection is located at the fin line in waveguide, and described fin line stays with wave guide wall
There is certain spacing, adjustment spacing is optimal return loss and insertion loss, PIN diode is connected between two fin lines,
Metallic vias is provided with two outsides of wave guide wall.
A kind of 2. Finline switched feed circuits according to claim 1, it is characterised in that described LPF
Device could alternatively be high resistant line.
A kind of 3. Finline switched feed circuits according to claim 1, it is characterised in that described metallic vias
It is smaller than quarter-wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710624001.7A CN107689471B (en) | 2017-07-27 | 2017-07-27 | A kind of Finline switched feed circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710624001.7A CN107689471B (en) | 2017-07-27 | 2017-07-27 | A kind of Finline switched feed circuits |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107689471A true CN107689471A (en) | 2018-02-13 |
| CN107689471B CN107689471B (en) | 2019-11-05 |
Family
ID=61153096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710624001.7A Active CN107689471B (en) | 2017-07-27 | 2017-07-27 | A kind of Finline switched feed circuits |
Country Status (1)
| Country | Link |
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| CN (1) | CN107689471B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114171861A (en) * | 2021-12-03 | 2022-03-11 | 电子科技大学长三角研究院(湖州) | Miniaturized waveguide switch |
| CN116093560A (en) * | 2023-03-02 | 2023-05-09 | 电子科技大学 | Planar single-pole double-throw switch circuit structure formed by multiple layers of circuit boards |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2232303A (en) * | 1989-05-23 | 1990-12-05 | Marconi Gec Ltd | Waveguide switch |
-
2017
- 2017-07-27 CN CN201710624001.7A patent/CN107689471B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2232303A (en) * | 1989-05-23 | 1990-12-05 | Marconi Gec Ltd | Waveguide switch |
Non-Patent Citations (3)
| Title |
|---|
| SHUHAN JIA 等: ""W-band Finline SPST Switch"", 《2012 INTERNATIONAL CONFERENCE ON COMPUTATIONAL PROBLEM-SOLVING (ICCP)》 * |
| 吴尚昀: ""Ka波段高速脉冲检波器研究"", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
| 赖雷: ""五毫米波段单刀双掷开关的研究"", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114171861A (en) * | 2021-12-03 | 2022-03-11 | 电子科技大学长三角研究院(湖州) | Miniaturized waveguide switch |
| CN114171861B (en) * | 2021-12-03 | 2022-09-30 | 电子科技大学长三角研究院(湖州) | Miniaturized waveguide switch |
| CN116093560A (en) * | 2023-03-02 | 2023-05-09 | 电子科技大学 | Planar single-pole double-throw switch circuit structure formed by multiple layers of circuit boards |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107689471B (en) | 2019-11-05 |
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