CN105140612A - Dual-frequency-band electrically-tunable filtering type power divider - Google Patents
Dual-frequency-band electrically-tunable filtering type power divider Download PDFInfo
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- CN105140612A CN105140612A CN201510579668.0A CN201510579668A CN105140612A CN 105140612 A CN105140612 A CN 105140612A CN 201510579668 A CN201510579668 A CN 201510579668A CN 105140612 A CN105140612 A CN 105140612A
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Abstract
The invention discloses a dual-frequency-band electrically-tunable filtering type power divider and belongs to the technical field of microwave passive devices. According to the invention, a tunable filter is integrally arranged in the power divider, the complexity and the size of the power divider are reduced, and the power divider is provided with a dual-frequency independent adjustment function. According to the innovative scheme, adjusting elements which are first varactors (4) and a varactor (8) select access points independent in frequency modulation to carry out individual adjustment on two frequency bands. The dual-frequency-band electrically-tunable filtering type power divider can be applied to a microwave communication system and is applicable to a system small in size, low in cost and high in integration.
Description
Technical field
The invention belongs to microwave passive component technical field, particularly relate to a kind of two-band electrically regulated filtering type power splitter in microwave passive component.
Background technology
Along with the fast development of Modern Communication System, the function of microwave circuit becomes increasingly complex, requirement on electric performance is more and more higher, simultaneously also towards the future development of miniaturization, lightweight, low cost.This development trend requires to be formed in order to the commercialization adapting to microwave circuit.The performance of the multi-functional and device of device is adjustable is all the method for effective reduction circuit size, such as: the power splitter and the filter that coexist in same receiving and transmitting front end, can combine, composition has the power splitter of filtering characteristic, can conditioning technology if adopt again, greatly can reduce size, complexity and the cost of circuit.
The common power splitter with filtering characteristic divides additional filterings characteristic on arm in quarter-wave merit, although reduce size, be multiplied the number of filter.The existing power splitter with adjustable filtering characteristic, only achieve one-segment tunable characteristic, for the microwave system needing multiband adjustable, need multiple power splitter with adjustable filtering characteristic being operated in corresponding band respectively, cost adds the complexity of merit parallel circuit, volume and cost.
Summary of the invention
The object of the invention is to propose a kind of two-band electrically regulated filtering type power splitter, this power splitter inside is integrated with filter, to realize the extra filtering characteristic of power splitter, and adopts double frequency structure, load two groups of varactors, realize two working frequency range tunable characteristics of power splitter.
Technical scheme of the present invention is:
A kind of two-band electrically regulated filtering type power splitter, the input of this power splitter is made up of straight line 50 ohm microstrip, after microstrip line, be divided into symmetrical two branch roads, every bar props up route input parallel coupled line, bending microstrip line, two the first varactors, two pairs of plated-through holes and exports parallel coupled line composition; Two first varactor one end are connected in the middle of two bending microstrip lines, and the other end of two the first varactors is connected to floor by two pairs of plated-through holes; Finally exported by two bending 50 ohm microstrip, 100 Ohmic resistances are connected on the initiating terminal between two bending 50 ohm microstrip; Input parallel coupled line and output parallel coupled line middle are the second varactors, first patch capacitor and the second patch capacitor are close to and are symmetrically distributed in the second varactor upper and lower, the first patch capacitor and the second patch capacitor respectively with input parallel coupled line with export parallel coupled line central point and be connected; In the second varactor upside, be also connected to pull-up resistor and direct current biasing pad successively, in the second varactor lower side, be also connected to bending connecting line, Chip-R and plated-through hole successively; Pull-up resistor and direct current biasing pad are connected in turn and export parallel wire middle.
Further, bending microstrip line, input parallel coupled line are identical with output parallel coupled line live width, and three inside surrounds rectangle.
Further, the straight line that second varactor, the first patch capacitor and the second patch capacitor are formed and straight line 50 ohm microstrip conllinear, and perpendicular to Chip-R and plated-through hole, form π type with pull-up resistor, direct current biasing pad and pull-up resistor, direct current biasing pad.
Advantage of the present invention and beneficial effect:
(1) the present invention has the advantage of miniaturization, low cost.On the one hand, adopt double frequency technology, compare the double frequency that regular grade receipts or other documents in duplicate frequency filter realizes, make circuit size reduce half; On the other hand, the tunable component of this power splitter low frequency, shares a varactor, and the biasing circuit of varactor; Thus greatly reduce size and the cost of integrated circuit, and reduce the differential loss of circuit.
(2) power splitter of the present invention has the adjustable filtering characteristic of independent two-band, the adjustment between two frequency ranges, separate, during to single frequency band adjustments, does not affect another frequency band.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
Fig. 2 is the independent adjustable simulation result of low frequency of a kind of concrete structure of the present invention
Fig. 3 is the independent adjustable simulation result of high frequency of a kind of concrete structure of the present invention
Embodiment
In order to make object of the present invention, the technical problem of solution and technical scheme more clear, below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Fig. 1 is the structural representation of a concrete embodiment of the present invention.This power splitter is Wilkinson type power splitter, input is made up of straight line 50 ohm microstrip 1, live width is 1.1mm, after microstrip line, be divided into symmetrical two branch roads, every bar props up route input parallel coupled line 2, bending microstrip line 3, two the first varactors, 4, two pairs of plated-through holes 5 and exports parallel coupled line 6 and forms, and forms 90 degree of phase-shifting resonance devices that two, left and right has filtering characteristic, being equivalent to electrical length is four/wavelength, and characteristic impedance is the merit point minor matters of 70.7 ohm.Input parallel coupled line 2 and output parallel coupled line 6 length are 10mm.Two first varactor 4 one end are connected in the middle of two bending microstrip lines 3, and the other end of two the first varactors 4 is connected to floor by two pairs of plated-through holes 5.Finally exported by two bending 50 ohm microstrip 7,100 Ohmic resistances 17 are connected on the initiating terminal between two bending 50 ohm microstrip 7.Input parallel coupled line 2 and output parallel coupled line 6 middle are the second varactors 8, first patch capacitor 11 and the second patch capacitor 14 are close to and are symmetrically distributed in the second varactor 8 upper and lower, and the first patch capacitor 11 and the second patch capacitor 14 are respectively at input parallel coupled line 2 and export parallel coupled line 6 center and be connected.In the second varactor 8 upside, be also connected to pull-up resistor 12 and direct current biasing pad 13 successively, in varactor 8 lower side, be also connected to bending connecting line 18, Chip-R 9 and plated-through hole 10 successively.Pull-up resistor 16 and direct current biasing pad 15 are connected in turn and export parallel wire middle.First varactor 4 and the second varactor 8 only affect even mould resonance frequency and Qi Mo resonance frequency respectively, and therefore, this filtering type power splitter can be operated in the two-band of Independent adjustable.Plated-through hole diameter is 0.5mm.
Further, bending microstrip line 3, input parallel coupled line 2 are identical with output parallel coupled line 6 live width, and be 0.5mm, three inside surrounds the rectangle of 4.8mm × 36mm.
Further, the straight line that second varactor 8, first patch capacitor 11 and the second patch capacitor 14 are formed and straight line 50 ohm microstrip 1 conllinear, and perpendicular to Chip-R 9 and plated-through hole 10, form π type with pull-up resistor 12, direct current biasing pad 13 and pull-up resistor 16, direct current biasing pad 16.
The medium substrate that this filtering type power splitter adopts is TaconicRF-35, and dielectric substrate thickness is 0.508mm, and upper and lower double layer of metal copper foil layer thickness is 18um, and final substrate size is 26mm × 43mm.Varactor 4 and 8 is InfineonBB857, and the adjustable extent of its capacitor's capacity is 0.5pF-6.5pF; Patch capacitor 11 and 14, capacitance is 0.5pF, is encapsulated as 0402, and 100 Ohmic resistances 17 are encapsulated as 0603, and two pull-up resistors 12 and 16, resistance is 10kohm, is encapsulated as 0603, chip inductor 9, and inductance value is 20nH, is encapsulated as 0603.
Fig. 2 is the independent adjustable simulation result of the low frequency of this concrete embodiment, can find out: when the capacitance of fixing varactor 8 is 0.5pF, when varactor 4 changes to 1.5pF from 0.5pF, the low-frequency band centre frequency of this filtering type power splitter, 1700MHz is changed to from 1400MHz, adjustable extent is 300MHz, and high frequency band centre frequency remains 3400MHz.
Fig. 3 is the independent adjustable simulation result of the high frequency of this concrete embodiment, can find out: when the capacitance of fixing varactor 4 is 0.5pF, when varactor 8 changes to 1.0pF from 0.5pF, the low-frequency band centre frequency of this filtering type power splitter, remain 1700MHz, high frequency band centre frequency changes to 3400MHz from 3000MHz, and adjustable extent is 400MHz.
Simultaneously at all working centre frequency place, isolation is all better than 15dB, and input reflection loss is better than 10dB, and low frequency insertion loss is less than 4.3dB, and high frequency insertion loss is less than 2.0dB.
Those of ordinary skill in the art will appreciate that, embodiment described here is to help reader understanding's principle of the present invention, should be understood to that protection scope of the present invention is not limited to so special statement and embodiment.Those of ordinary skill in the art can make according to these technology disclosed by the invention enlightenment and variously not depart from other various concrete distortion and combination of the present invention, and these distortion and combination are still in protection scope of the present invention.
Claims (3)
1. a two-band electrically regulated filtering type power splitter, it is characterized in that: the input of this power splitter is made up of straight line 50 ohm microstrip (1), after microstrip line, be divided into symmetrical two branch roads, every bar props up route input parallel coupled line (2), bending microstrip line (3), two the first varactors (4), two pairs of plated-through holes (5) and exports parallel coupled line (6) composition; Two the first varactor (4) one end are connected in the middle of two bending microstrip lines (3), and the other end of two the first varactors (4) is connected to floor by two pairs of plated-through holes (5); Finally exported by two bendings 50 ohm microstrip (7), 100 Ohmic resistances (17) are connected on the initiating terminal between two bendings 50 ohm microstrip (7); Input parallel coupled line (2) and output parallel coupled line (6) middle are the second varactor (8), first patch capacitor (11) and the second patch capacitor (14) are close to and are symmetrically distributed in the second varactor (8) upper and lower, the first patch capacitor (11) and the second patch capacitor (14) respectively with input parallel coupled line (2) with export parallel coupled line (6) central point and be connected; In the second varactor (8) upside, also be connected to pull-up resistor (12) and direct current biasing pad (13) successively, in the second varactor (8) lower side, be also connected to bending connecting line (18), Chip-R (9) and plated-through hole (10) successively; Pull-up resistor (16) and direct current biasing pad (15) are connected in turn and export parallel wire middle.
2. a kind of two-band electrically regulated filtering type power splitter according to claim 1, it is characterized in that: bending microstrip line (3), input parallel coupled line (2) are identical with exporting parallel coupled line (6) live width, and three inside surrounds rectangle.
3. a kind of two-band electrically regulated filtering type power splitter according to claim 1, it is characterized in that: the straight line that the second varactor (8), the first patch capacitor (11) and the second patch capacitor (14) are formed and straight line 50 ohm microstrip (1) conllinear, and perpendicular to Chip-R (9) and plated-through hole (10), form π type with pull-up resistor (12), direct current biasing pad (13) and pull-up resistor (16), direct current biasing pad (15).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510579668.0A CN105140612B (en) | 2015-09-12 | 2015-09-12 | A kind of two-band electrically regulated filtering type power splitter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510579668.0A CN105140612B (en) | 2015-09-12 | 2015-09-12 | A kind of two-band electrically regulated filtering type power splitter |
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| CN105140612A true CN105140612A (en) | 2015-12-09 |
| CN105140612B CN105140612B (en) | 2018-02-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448113A (en) * | 2020-11-19 | 2021-03-05 | 南京邮电大学 | Butterfly-shaped microstrip filtering power divider |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5489880A (en) * | 1993-08-10 | 1996-02-06 | Com Dev Ltd. | Power divider/combiner with lumped element bandpass filters |
| CN102403562A (en) * | 2011-11-02 | 2012-04-04 | 华南理工大学 | Powder divider integrating a dual-frequency bandpass filter |
| KR101224762B1 (en) * | 2011-07-18 | 2013-01-21 | 경희대학교 산학협력단 | Ultra wideband power divider/combiner with rejection band |
-
2015
- 2015-09-12 CN CN201510579668.0A patent/CN105140612B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5489880A (en) * | 1993-08-10 | 1996-02-06 | Com Dev Ltd. | Power divider/combiner with lumped element bandpass filters |
| KR101224762B1 (en) * | 2011-07-18 | 2013-01-21 | 경희대학교 산학협력단 | Ultra wideband power divider/combiner with rejection band |
| CN102403562A (en) * | 2011-11-02 | 2012-04-04 | 华南理工大学 | Powder divider integrating a dual-frequency bandpass filter |
Non-Patent Citations (2)
| Title |
|---|
| CHI-FENG CHEN 等: ""Compact Microstrip Electronically Tunable Power Divider With Chebyshev Bandpass Response"", 《PROCEEDINGS OF ASIA-PACIFIC MICROWAVE CONFERENCE 2014》 * |
| MITCHAI CHONGCHEAWCHAMNAN 等: ""Frequency-selectable dual-band Wilkinson divider/combiner"", 《IET MICROWAVES, ANTENNAS & PROPAGATION》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448113A (en) * | 2020-11-19 | 2021-03-05 | 南京邮电大学 | Butterfly-shaped microstrip filtering power divider |
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| CN105140612B (en) | 2018-02-13 |
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