CN206961987U - A kind of new micro-strip restructural multi-mode filter - Google Patents
A kind of new micro-strip restructural multi-mode filter Download PDFInfo
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- CN206961987U CN206961987U CN201720700957.6U CN201720700957U CN206961987U CN 206961987 U CN206961987 U CN 206961987U CN 201720700957 U CN201720700957 U CN 201720700957U CN 206961987 U CN206961987 U CN 206961987U
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- transmission line
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- mode filter
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Abstract
The utility model discloses a kind of new micro-strip restructural multi-mode filter, when DC offset voltage adds forward voltage, now diode current flow, turned between transmission line 11 and transmission line 13 and between transmission line 12 and transmission line 13, filter passband centre frequency is in high frequency treatment；When DC offset voltage adds backward voltage, now diode ends, between transmission line 11 and transmission line 13 and transmission line 12 and transmission line 13 it is separated, filter passband centre frequency is at low frequency.The utility model realizes the switching of band connection frequency by the break-make of PIN diode, simple in construction.
Description
Technical field
The utility model belongs to millimeter wave and microwave device technology field, and in particular to a kind of new micro-strip restructural multimode
Wave filter.
Background technology
Into after 21 century, wireless communication technology has development at full speed, and Wireless Telecom Equipment is also seen everywhere.4G
(FDD-LTE, TDD-LTE) is popularized comprehensively, in order to meet growing connection requirement, and along with virtual existing
The development of the technology such as real, augmented reality and Internet of Things cloud computing, people have started 5G research and development again.It is following that wireless device is proposed
A series of new demands such as lower price, lighter weight, bigger capacity.Wave filter is that Wireless Telecom Equipment is indispensable
A part, there is frequency selective characteristic, useful signal can be filtered out, and unwanted signal suppressed, radar,
Widely used in many electronic equipments such as mobile communication.The good and bad performance to whole communication equipment of its performance has important shadow
Ring.
Multiple communications bands are had in same communication system, in order to realize the function, the multigroup receipts of use of comparative maturity
Hair technology, but investment of this technology to device is very big.Single filter just can be used using restructural multi-mode filter technology,
To realize multiple frequency characteristics.By adding adjustable element in wave filter, it is possible to realize to passband central frequency, bandwidth and
The regulation of the parameters such as Out-of-band rejection.
Utility model content
The purpose of this utility model is to overcome deficiency of the prior art, there is provided a kind of new micro-strip restructural multimode
Wave filter, the PIN diode that the wave filter uses realize the switching of band connection frequency, and the wave filter of design has that size is small, structure
The advantages that simple.
In order to solve the above technical problems, the utility model provides a kind of new micro-strip restructural multi-mode filter, including
Medium substrate, metal floor is provided with the bottom surface of medium substrate, is etched with microwave circuit in the upper surface of medium substrate, its feature
It is that microwave circuit includes the first feeding network, multimode toroidal cavity resonator and the second feeding network being sequentially connected, the first transmission network
Network, multimode toroidal cavity resonator and the second feeding network form using at the vertical center of multimode toroidal cavity resonator as symmetrical center line
Symmetrical structure；
Wherein the first feeding network is made up of transmission line four, and the second feeding network is made up of transmission line five, transmission line four with
Transmission line five is double finger structures and is symmetrical arranged；The left port of transmission line four is as input port, the right output port of transmission line five
As output port；
Multimode toroidal cavity resonator includes transmission line six, transmission line seven, transmission line eight, transmission line nine, transmission line ten, transmission line
11, transmission line 12, transmission line 13 and PIN diode, transmission line nine, transmission line eight and transmission line ten are sequentially connected structure
Into the right angle ∪ shapes of opening upwards, the left and right sides difference horizontal connection transmission line six and transmission line seven of transmission line eight, transmission line
Six between double fingers of transmission line four, and transmission line seven is located between double fingers of transmission line five, one end vertical connection of transmission line nine
Transmission line 11, one end vertical connection transmission line 12 of transmission line ten, and transmission line 11 and transmission line 12 are relative orientation,
Being horizontally disposed with positioned at the centre position of transmission line 11 and transmission line 12 has transmission line 13, transmission line 11 and transmission line ten
Connect between three and between transmission line 12 and transmission line 13 diode, be grounded after the series inductance of transmission line 13；Two
The both ends of pole pipe provide DC offset voltage by Bias circuits.
The course of work of the utility model wave filter is：When DC offset voltage adds forward voltage, now diode
Conducting, is turned on, filter passband between transmission line 11 and transmission line 13 and between transmission line 12 and transmission line 13
Centre frequency is in high frequency treatment；
When DC offset voltage adds backward voltage, now diode ends, transmission line 11 and transmission line 13 it
Between and transmission line 12 and transmission line 13 it is separated, filter passband centre frequency is at low frequency.Pass through PIN diode
Break-make realize the switching of band connection frequency.
Further, both sizes of transmission line four and transmission line five are identical.
Further, transmission line six is identical with the width in gap above and below double fingers of transmission line four, transmission line seven and transmission line
The width in gap is identical above and below five double fingers.
Further, the symmetrical centre of the wave filter and transmission line 13 and the vertical center superposition of transmission line eight.
Further, Bias circuits include resistance R, electric capacity C and inductance L, DC supply input are directly connected to electricity all the way
It is grounded after holding C, the anode of diode is connected after another way series resistance R and inductance L.
Further, the thickness of medium substrate is 0.508mm, dielectric constant 3.38, loss angle tangent 0.0027.
Compared with prior art, the beneficial effect that the utility model is reached is：The PIN diode that the wave filter uses is real
The switching of existing band connection frequency, this filter construction are simple.
Brief description of the drawings
Fig. 1 is the side view of micro-strip restructural multi-mode filter；
Fig. 2 is the structural representation of micro-strip restructural multi-mode filter；
When Fig. 3 is that micro-strip restructural multi-mode filter PIN diode turns on, frequency range emulates and actual measurement S ginsengs in 1-6GHz
Number schematic diagram；
When Fig. 4 is that micro-strip restructural multi-mode filter PIN diode ends, frequency range emulates and actual measurement S ginsengs in 1-6GHz
Number schematic diagram.
Reference：1st, microwave circuit；2nd, medium substrate；3rd, metal floor；4th, transmission line four；5th, transmission line five；6th, pass
Defeated line six；7th, transmission line seven；8th, transmission line eight；9th, transmission line nine；10th, transmission line ten；11st, transmission line 11；12nd, transmission line ten
Two；13rd, transmission line 13.
Embodiment
The utility model is further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating this
The technical scheme of utility model, and the scope of protection of the utility model can not be limited with this.
A kind of new micro-strip restructural filtering of the present utility model, as shown in figure 1, including medium substrate 2, medium substrate 2
Using the substrate of double-sided copper-clad in the prior art, its thickness is 0.508mm, dielectric constant 3.38, and loss angle tangent is
0.0027.Metal floor 3 is provided with the bottom surface of medium substrate 2, microwave circuit 1, microwave are etched with the upper surface of medium substrate 2
Circuit 1 includes the first feeding network, multimode toroidal cavity resonator and the second feeding network that are sequentially connected, the first feeding network, more
Mould toroidal cavity resonator and the second feeding network form using at the vertical center of multimode toroidal cavity resonator as the symmetrical of symmetrical center line
Structure.
As shown in Fig. 2 wherein the first feeding network is made up of transmission line 44, the second feeding network is by the structure of transmission line 55
Into transmission line 44 is double finger structures with transmission line 55, and both sizes are identical, and are symmetrical arranged.By taking transmission line 44 as an example,
It is L that this pair, which refers to structure feeding network overall length,1, double fingers of microstrip line and right side comprising left side, left side micro belt line width is W1, it is right
The dimensional parameters of the double fingers in side are identical, length L2, width W2.The left port of transmission line 44 is as input port Port1, transmission
The right output port of line 55 is as output port Port2.
Multimode toroidal cavity resonator is by transmission line 66, transmission line 77, transmission line 88, transmission line 99, transmission line 10, biography
Defeated line 11, transmission line 12, transmission line 13 and PIN diode composition.Transmission line 99, transmission line 88 and biography
Defeated line 10 is sequentially connected the right angle ∪ shapes for forming opening upwards, the left and right sides difference horizontal connection transmission line of transmission line 88
66 and transmission line 77, transmission line 66 be located between double fingers of transmission line 44, transmission line 77 is located at double fingers of transmission line 55
Between, vertical connection transmission line 11, one end vertical connection transmission line 12 of transmission line 10 are continued in the one end of transmission line 99
12, and transmission line 11 and transmission line 12 are relative orientation, in transmission line 11 and transmission line 12
Between position is horizontally disposed transmission line 13, connected SMP1345-079 between transmission line 11 and transmission line 13
Type PIN diode, SMP1345-079 type PIN diodes of also having been connected between transmission line 12 and transmission line 13, transmission
It is grounded after the series inductance L of line 13.
The belt resonator of the multimode is symmetrical structure, and symmetry axis is dotted line in Fig. 2, and the dotted line passes through the He of transmission line 13
The center of transmission line 88.The dimensional parameters of each microstrip line are specifically as shown in table 1 in resonator.Transmission line 77 is inserted into transmission line
Between 55 double fingers, transmission line 66 is inserted between double fingers of transmission line 44, refers to the gap that same widths be present with double up and down,
Gap makes double fingers of transmission line 66 (or transmission line 7) and transmission line 44 (or transmission line 5 5) produce coupling.
Table 1：The design parameter of every section of transmission line of resonator
| L1 | L2 | L3 | L4 | L5 | L6 | L7 |
| 12mm | 9.5mm | 10mm | 9.5mm | 7.23mm | 2.3mm | 3.0mm |
| W1 | W2 | W3 | W4 | W5 | W6 | |
| 1.16mm | 0.28mm | 0.30mm | 0.80mm | 0.80mm | 0.80mm |
The both ends of PIN diode provide DC offset voltage by Bias circuits, and Bias circuits include resistance R, electric capacity C and electricity
Feel L, DC supply input is grounded after being directly connected to electric capacity C all the way, and diode is connected after another way series resistance R and inductance L
Anode.Inductance L in Bias circuits is 50nH, and series inductance can prevent radiofrequency signal to be crosstalked into dc source.Resistance R is
221 Ω, resistance are used for control electric current size, provide suitable operating current for diode, electric capacity C is 10pF, and electric capacity can be filtered
Except the clutter in power supply.
The course of work of wave filter of the present utility model is：
When wave filter DC offset voltage is plus forward voltage (as+3V), now diode current flow, transmission line 11
Turned between transmission line 13 and between transmission line 12 and transmission line 13, filter passband centre frequency exists
High frequency treatment.
When wave filter DC offset voltage is plus backward voltage (such as -3V), now diode ends, transmission line 11
Between transmission line 13 and transmission line 12 and transmission line 13 it is separated, filter passband centre frequency exists
At low frequency.
The wave filter realizes the switching of band connection frequency by controlling conducting and the cut-off of diode, and this wave filter has knot
The simple advantage of structure.
The frequency response characteristic of wave filter is including transmission characteristic | S21 | amplitude response, reflection characteristic be | and S11 | amplitude is rung
Should.Fig. 3 is the emulation and actual measurement S parameter when DC offset voltage adds+3V, and now diode current flow, actual measurement shows wave filter
3dB passbands be that frequency is 3.15-4.64GHz, the Insertion Loss at centre frequency is 1dB.Filter passband centre frequency is in high frequency
Place.Fig. 4 is the emulation and actual measurement S parameter when DC offset voltage adds -3V, and now diode ends, and actual measurement shows wave filter
3dB passbands are that frequency is 2.4-2.9GHz, and the Insertion Loss at centre frequency is 2.1dB.Filter passband centre frequency is in low frequency
Place.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model technical principle is not departed from, some improvement and modification can also be made, these change
Enter and also should be regarded as the scope of protection of the utility model with modification.
Claims (6)
1. a kind of new micro-strip restructural multi-mode filter, including medium substrate, metal floor is provided with the bottom surface of medium substrate,
Be etched with microwave circuit in the upper surface of medium substrate, it is characterized in that, microwave circuit include be sequentially connected the first feeding network,
Multimode toroidal cavity resonator and the second feeding network, the first feeding network, multimode toroidal cavity resonator and the second feeding network form with
It is the symmetrical structure of symmetrical center line at the vertical center of multimode toroidal cavity resonator；
Wherein the first feeding network is made up of transmission line four, and the second feeding network is made up of transmission line five, transmission line four and transmission
Line five is double finger structures and is symmetrical arranged；The left port of transmission line four is as input port, the right output port conduct of transmission line five
Output port；
Multimode toroidal cavity resonator includes transmission line six, transmission line seven, transmission line eight, transmission line nine, transmission line ten, transmission line ten
First, transmission line 12, transmission line 13 and PIN diode, transmission line nine, transmission line eight and transmission line ten are sequentially connected composition
The right angle ∪ shapes of opening upwards, the left and right sides difference horizontal connection transmission line six and transmission line seven of transmission line eight, transmission line six
Between double fingers of transmission line four, transmission line seven is located between double fingers of transmission line five, and one end vertical connection of transmission line nine passes
Defeated line 11, one end vertical connection transmission line 12 of transmission line ten, and transmission line 11 and transmission line 12 are relative orientation, position
Being horizontally disposed with the centre position of transmission line 11 and transmission line 12 has transmission line 13, transmission line 11 and transmission line 13
Between and transmission line 12 and transmission line 13 between connected diode, be grounded after the series inductance of transmission line 13；Two poles
The both ends of pipe provide DC offset voltage by Bias circuits.
2. a kind of new micro-strip restructural multi-mode filter according to claim 1, it is characterized in that, transmission line four and transmission
Both sizes of line five are identical.
3. a kind of new micro-strip restructural multi-mode filter according to claim 1, it is characterized in that, transmission line six and transmission
The width in gap is identical above and below double fingers of line four, and transmission line seven is identical with the width in gap above and below double fingers of transmission line five.
4. a kind of new micro-strip restructural multi-mode filter according to claim 1, it is characterized in that, pair of the wave filter
Title center and transmission line 13 and the vertical center superposition of transmission line eight.
5. a kind of new micro-strip restructural multi-mode filter according to claim 1, it is characterized in that, Bias circuits include electricity
Resistance R, electric capacity C and inductance L, DC supply input are grounded after being directly connected to electric capacity C all the way, another way series resistance R and inductance L
The anode of diode is connected afterwards.
6. a kind of new micro-strip restructural multi-mode filter according to claim 1, it is characterized in that, the thickness of medium substrate
For 0.508mm, dielectric constant 3.38, loss angle tangent 0.0027.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720700957.6U CN206961987U (en) | 2017-06-16 | 2017-06-16 | A kind of new micro-strip restructural multi-mode filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720700957.6U CN206961987U (en) | 2017-06-16 | 2017-06-16 | A kind of new micro-strip restructural multi-mode filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206961987U true CN206961987U (en) | 2018-02-02 |
Family
ID=61380182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720700957.6U Withdrawn - After Issue CN206961987U (en) | 2017-06-16 | 2017-06-16 | A kind of new micro-strip restructural multi-mode filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206961987U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425245A (en) * | 2017-06-16 | 2017-12-01 | 南京信息工程大学 | A kind of new micro-strip restructural multi-mode filter |
| CN109596866A (en) * | 2018-12-26 | 2019-04-09 | 中国电子科技集团公司第十三研究所 | Feed circuit structure and test fixture |
| CN110247143A (en) * | 2019-06-19 | 2019-09-17 | 南京信息工程大学 | It is a kind of with changeable and tunable microstrip bandpass filter |
-
2017
- 2017-06-16 CN CN201720700957.6U patent/CN206961987U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107425245A (en) * | 2017-06-16 | 2017-12-01 | 南京信息工程大学 | A kind of new micro-strip restructural multi-mode filter |
| CN107425245B (en) * | 2017-06-16 | 2019-11-22 | 南京信息工程大学 | A kind of restructural multi-mode filter of novel micro-strip |
| CN109596866A (en) * | 2018-12-26 | 2019-04-09 | 中国电子科技集团公司第十三研究所 | Feed circuit structure and test fixture |
| CN110247143A (en) * | 2019-06-19 | 2019-09-17 | 南京信息工程大学 | It is a kind of with changeable and tunable microstrip bandpass filter |
| CN110247143B (en) * | 2019-06-19 | 2023-12-19 | 南京信息工程大学 | Microstrip band-pass filter with switchable and tunable functions |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180202 Effective date of abandoning: 20191122 |
|
| AV01 | Patent right actively abandoned |