CN101236246B - Millimeter wave miniaturized multichannel transmitting-receiving subassembly and its phase compensation process - Google Patents
Millimeter wave miniaturized multichannel transmitting-receiving subassembly and its phase compensation process Download PDFInfo
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Abstract
The invention provides a millimeter wave miniaturized multichannel transceiving component device and a phase compensation method thereof. The transceiving component device of the invention comprises a transmitting branch, a receiving branch, a switch, a power splitting circuit and a metal box body, belonging to the radar component technical field. The transceiving component device is realized by a millimeter wave periplanatic integrated circuit based on MMIC (millimeter wave monolithic integrated circuit) technology, and no source phase-shift device is arranged inside a transceiving component. The interchannel phase compensation method of the invention is to utilize a micro strip loading high dielectric constant medium which plays a part in cascade connection in the transceiving component. Phase error compensation within the range of 0 to 360 DEG can be realized by selecting different loading media, and the amplitude consistency is not affected. The invention has the advantages of simple and convenient debugging, skillful design, miniaturization and so on and is a transceiving component device with strong operability and effectiveness and a phase compensation method thereof.
Description
Technical field
The invention belongs to the radar component technical field.
Background technology
Transmitting-receiving subassembly is the indispensable ingredient of radar, combines with different antennas, can be widely used in fields such as mobile communication, military detection, electronic countermeasure.To different application backgrounds, transmitting-receiving subassembly has been proposed the different techniques requirement, but miniaturization, integrated be the effective way that improves the transmitting-receiving subassembly practicality.Simultaneously, the transmitting-receiving subassembly of single passage can't satisfy the needs of advanced capabilities radar device, has only multichannel transmitting-receiving subassembly just to have more deep learning value and construction value.In conjunction with technical requirements such as the polarization characteristic of radar installations, spatial power are synthetic, stricter requirement has been proposed for the interchannel phase relation of multichannel transmitting-receiving subassembly.
For the millimeter wave multichannel transmitting-receiving subassembly, along with the development of microelectronic technique, in order to realize the miniaturization purpose, active device all is to adopt MMIC (millimeter wave monolithic integrated circuit) technology to realize.Based on existing home and abroad manufacture level, the chip-scale active device is easy to realize the consistance of amplitude output signal, but phase equalization can't guarantee that and phase error is within ± 180 degree scopes.Common millimeter wave multichannel transmitting-receiving subassembly all adopts the method for adding millimeter phase-shifter to carry out phase compensation, and its Insertion Loss is bigger, reaches 7dB; And the phase modulation low precision, the minimum angle adjustable of phase place is 11.25 degree; Increase a phase shifter and also can increase by 10 mm lengths, system bulk is increased.For millimeter wave miniaturized multichannel transmitting-receiving subassembly; Guaranteeing under the constant condition of output power; Under interchannel range error 0.5dB retrains with interior system requirements with interior and phase error 10 degree; The contradiction that can't be in harmonious proportion takes place in method and miniaturized system structure and the index request that adds millimeter phase-shifter in the past; And still do not have relevant effective implementation method at home and abroad, therefore in the high integration active circuit how between easy compensation transceiver channel amplitude phase error be the crucial difficult point that realizes millimeter wave miniaturized multichannel transmitting-receiving subassembly.
Summary of the invention
Fundamental purpose of the present invention is to solve above technical matters.Especially, an object of the present invention is to provide a kind of transmitting-receiving subassembly device, it can realize the millimeter wave miniaturized multichannel transmitting-receiving subassembly of given phase relation with the mode of Highgrade integration, and does not compare with relevant traditional product and need use millimeter phase-shifter.
Another object of the present invention provides a kind of interchannel phase compensating method of millimeter wave miniaturized multichannel transmitting-receiving subassembly, is a kind of Passively compensated method, and need not to increase the volume of assembly.
In order to realize above purpose, aspect of invention, the invention provides a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device, comprise transmitting branch, receiving branch, switch, merit parallel circuit and metal case.Each function element all is arranged on metal case inside, and transmitting branch and receiving branch all have the phase compensating network that is made up of medium loaded microstrip line.
Millimeter wave miniaturized multichannel transmitting-receiving subassembly, wherein each function element are the millimeter wave whole plane integrated circuit that is the basis with MMIC (millimeter wave monolithic integrated circuit) technology, and activated amplifier is realized by high performance mmic chip.Transmitting branch includes source amplifier, microstrip line (MS) and phase compensating network (PC).Wherein, Activated amplifier; Comprise final power amplifier (PA) and promote level driving amplifier (A); Activated amplifier is realized by high performance mmic chip, promotes level amplifier (A) and confirms according to the performance number that final power amplifier (PA) needs to promote, and enough also can not promote a grade amplifier (A) if promote power; Microstrip line (MS), each function element of cascade utilizes the gold thread bonding to realize connecting of function element and microstrip line (MS); Phase compensating network (PC); It is inner and in the air shielding cavity of microstrip line (MS) top that loaded medium is arranged on metal case; Arrive on the input stage microstrip line before of final power amplifier (PA) after being arranged on transmitting branch merit parallel circuit (Dv) output stage, can guarantee the consistance of the amplitude of transmitting like this.
Receiving branch includes source amplifier, frequency mixer (MX), microstrip line (MS) and phase compensating network (PC).Wherein, activated amplifier comprises low noise amplifier (LNA), is realized by high performance mmic chip, and low noise amplifier (LNA) uses choosing according to the receiver gain of system requirements of number to confirm; Frequency mixer (MX) receives the signal linearity with millimeter wave and is transformed into lower frequency without distortion; Microstrip line (MS), each function element of cascade utilizes the gold thread bonding to realize connecting of function element and microstrip line (MS); Phase compensating network (PC); It is inner and in the air shielding cavity of microstrip line (MS) top that loaded medium is arranged on metal case; Arrive on the input stage microstrip line before of frequency mixer (MX) after being arranged on receiving branch merit parallel circuit (Dv) output stage, can guarantee to receive the consistance of signal amplitude like this
Merit parallel circuit (Dv) is realized a plurality of passages multiplexing to the millimeter-wave signal source module; Switch (SPDT) is realized transceiver channel multiplexing to millimeter wave antenna, more than the purpose of two devices all be to guarantee the component miniaturization characteristics in order to reduce mmic chip quantity.
This transmitting-receiving subassembly device provided by the invention possesses characteristics such as miniaturization, easy realization, and can be applied to the broadband millimeter-wave radar.
Material, length, thickness, the width of phase compensation amount and loaded medium and the position of putting are relevant, but realize that the principle of phase compensation is consistent.
The material of loaded medium just can be realized effective transmitting-receiving subassembly phase compensation function so long as different with the specific inductive capacity of air and less in the loss angle of millimeter wave frequency band.Loaded medium in the phase compensating network is the high dielectric constant of the little and specific inductive capacity of the loss angle of millimeter wave frequency band greater than air, and loaded medium commonly used is teflon, ceramic powders or pottery, and its specific inductive capacity is respectively 2.2,3.48,9.8.
In principle, high dielectric constant replaces air, has increased the effective dielectric constant ε of microstrip line transmission medium
Re, cause the guide wavelength λ of transmission line
gReduce, thereby cause phase-shift phase to change.Therefore because the existence of electric field; Loaded medium is placed in optional position, conductor belt top all can produce phase-shift characterisitc; So the position that medium is put not is unique; But the principle of phase compensation all is consistent, and just compensation rate is different, with medium be placed in conductor belt directly over the phase-shift phase that causes maximum.The suitable position that is provided be the microstrip line conductor belt directly over; And the medium both sides closely link to each other with the shielding cavity sidewall; It is fully contacted with metallic shield box sidewall; The inner heat of medium this moment can conduct through sidewall to greatest extent, and the power capacity and the temperature stability that have improved phase compensating network are to guarantee the power capacity of this phase compensating network.
Loaded medium can be an arbitrary shape, all can cause phase compensation as long as put in position.And be the predictability that guarantees phase compensation amount, the rectangular shape of selective rule is loaded as the best.Under the situation of known phase error theta, can derive the computing formula of regular rectangular parallelepiped medium length b under the no transition section situation, for
In order to reduce because loaded medium produces the deterioration to the Insertion Loss and the standing wave of system of corrective network that discontinuity surface causes, the transition network of loading stepped shape or ramped shaped in the medium both sides.Transition network length is changeable as required, also can not have.This transition network length is long more, and transition effect is good more, therefore under the condition that microstrip line length allows, increases the length a of gradual transition section as far as possible; If the microstrip line length limited can only be that cost guarantees the phase compensation performance to sacrifice standing wave and Insertion Loss, promptly reduces a, opposite extreme situations is the rectangle loaded medium that does not have transition section.
The transition network of loading stepped shape or ramped shaped in the medium both sides, transition network length is changeable as required.Can find out that through formula (1) under the condition that microstrip line length allows, the interchannel phase compensation scope of utilizing implementation method provided by the invention to realize is the 0-360 degree.
According to another aspect of the present invention, a kind of phase compensating method of millimeter wave miniaturized multichannel transmitting-receiving subassembly device is provided, it comprises: the phase relation requirement between each transceiver channel is calculated in the requirement according to radar installations; Measure transmitting branch and obtain the channel phases error; Loaded medium is set, to constitute phase compensating network in transmitting branch; Measure receiving branch and obtain the channel phases error; Loaded medium is set, to constitute phase compensating network in transmitting branch.
The material of loaded medium just can be realized effective transmitting-receiving subassembly phase compensation function so long as different with the specific inductive capacity of air and less in the loss angle of millimeter wave frequency band.Loaded medium in the phase compensating network is the high dielectric constant of the little and specific inductive capacity of the loss angle of millimeter wave frequency band greater than air, and loaded medium commonly used is teflon, ceramic powders or pottery.
Loaded medium can be an arbitrary shape, all can cause phase compensation as long as put in position.And be the predictability that guarantees phase compensation amount, the rectangular shape of selective rule is loaded as the best.Under the situation of known phase error theta, can derive the computing formula of regular rectangular parallelepiped medium length b under the no transition section situation, for
Wherein, b is the length of phase compensation section, and θ is the known phase error, λ
0Be the microstrip line guide wavelength of air dielectric, ε
ReBe the propagation medium equivalent relative dielectric constant.
Implementation method provided by the invention can be applied to all frequency ranges, and according to the different working frequency, the corresponding phase compensation value of identical loaded medium length changes to some extent, and its value does
Wherein, θ is the known phase error, and b is the length of phase compensation section, λ
0Be the microstrip line guide wavelength of air dielectric, ε
ReBe the propagation medium equivalent relative dielectric constant.
The beneficial effect of antenna assembly provided by the invention and implementation method is:
1) millimeter wave miniaturized multichannel transmitting-receiving subassembly is realized the required given phase relation of radar; Utilize the space composition principle to obtain big emissive power; Save circuit stages power comprise network, can improve the power combined coefficient greatly, improve the effective radiation gain of antenna effectively.
2) utilize the microstrip line that plays each function element effect of connection; Choose suitable high dielectric constant and realize the full phase error compensation in ± 180 degree scopes; Need not to increase the transmitting-receiving subassembly volume like this to add the phase error compensation network, satisfy system's miniaturization requirement.
3) in the transmitting branch, phase compensating network is arranged at before the final power amplifier input stage, and promotion power is reserved certain allowance and can be guaranteed that just transmission channel all is in the saturation region all the time, so this phase compensating method does not influence emissive power and transmitting pattern.
4) in the receiving branch, phase compensating network is arranged at before the frequency mixer local oscillation signal input stage, and local oscillation power is reserved certain allowance can guarantee that just mixer conversion loss is constant all the time, so this phase compensating method does not influence received power.
5) bandwidth of operation of the millimeter wave miniaturized multichannel transmitting-receiving subassembly of this compensation method of process can satisfy the application requirements of mobile communication, military detection and electronic countermeasure basically greater than 500MHz.
6) phase compensating method is simple and easy to operate, has utilized the microstrip line of cascade function device effect to accomplish, and loaded medium can adopt teflon, pottery or the like, and directly gets final product through gluing the connecing of low-loss between loaded medium and the microstrip line.
7) the transmitting-receiving subassembly phase compensating method of the present invention's proposition also can be applied to other all frequency ranges; Just according to the different working frequency; The corresponding phase compensation value of identical loaded medium length changes to some extent, and concrete loaded medium length calculation formula is seen formula (2).
Description of drawings
Fig. 1-millimeter wave miniaturized multichannel transmitting-receiving subassembly theory diagram, wherein: PA-final power amplifier, A-promote level amplifier, LNA-low noise amplifier, MX-frequency mixer, Dv-power splitter, MS-microstrip line, SPDT-switch, PC-phase compensating network;
Fig. 2---the phase compensating method synoptic diagram of medium loaded microstrip line, wherein: 1-loaded medium, 2-microstrip line, 3-metallic shield box;
Fig. 3---load the phase shift measured result that different high dielectric constants cause;
Fig. 4---the transmission channel phase error measured result before and after the compensation,
Wherein: Fig. 4-1---measured result before and after the 95 degree phase error compensations, Fig. 4-2-50 degree phase place, measured result before and after the error compensation, Fig. 4-3---measured result before and after the 35 degree phase error compensations;
The closed loop compensation method flow diagram of Fig. 5-millimeter wave miniaturized multichannel transmitting-receiving subassembly.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is the millimeter wave miniaturized multichannel transmitting-receiving subassembly theory diagram, is example with four the tunnel.For realizing miniaturization structure, four transmission channels realize that through two-stage merit parallel circuit function element is few like this, compact conformation in radio frequency part; Shortcoming is that the interchannel phase error compensation must be accomplished in radio frequency part, and the method for adding millimeter phase-shifter is in the past carried out the method inefficacy of phase compensation; The mixing local oscillator of four receiving cables also is to realize through two-stage merit parallel circuit.
Fig. 2 is the phase compensating method synoptic diagram of medium loaded microstrip line.Load high dielectric constant in the air shielding cavity above microstrip line.In order to guarantee that phase compensating network does not influence output power, transmitting branch before the input stage of final power amplifier, is realized the phase error compensation of multichannel transmission channel through the easy phase compensating network of loaded medium on the microstrip line; Receiving branch at mixing local oscillator place, is realized the phase error compensation of multichannel transmission channel through the easy phase compensating network of loaded medium on the microstrip line, thereby realizes the phase error compensation of millimeter wave miniaturized multichannel transmitting-receiving subassembly.Length and material (being specific inductive capacity) through changing loaded medium can change the compensating phase shift amount.
Fig. 3 loads the phase shift measured result that different high dielectric constants cause.Fill medium for three kinds and be respectively teflon, ceramic powders and pottery; Its specific inductive capacity is respectively 2.2,3.48 and 9.8; Wherein polytetrafluoroethylmaterial material thickness is 3 millimeters; And the thickness of ceramic powders and pottery is 0.5 millimeter, for realizing the full phase compensation of 360 degree, can utilize the multi-layer ceramics plate structure to realize.
Fig. 4 is the transmitting-receiving subassembly phase error measured result before and after the compensation.This measured result is to be the transmission channel phase error of example metrophia compensation front and back with the millimeter wave miniaturized transmitting-receiving subassembly of four-way, therefore has three groups of interchannel phase error curves.Compensation prepass phase error is respectively 95 degree, 50 degree and 35 degree at 33GHz in the working frequency range of 33.5GHz, compensation back channel phases error is zero at 33GHz in the working frequency range of 33.5GHz basically, and precision is in 5 degree.
Fig. 5 is an active transmitting antenna closed loop compensation method flow diagram.First step is calculated the phase relation requirement between each transceiver channel according to the requirement of radar installations; Second step is measured transmitting branch and is obtained the channel phases error, directly gets into the 4th step if error amount is zero, if the non-vanishing third step that then gets into of error amount; Third step is provided with loaded medium in transmitting branch, to constitute phase compensating network, return second step; The 4th step is measured receiving branch and is obtained the channel phases error, if error amount is zero phase compensation work that finishes transmitting-receiving subassembly, if non-vanishing the 5th step that then gets into of error amount; The 5th step is provided with loaded medium in transmitting branch, to constitute phase compensating network, return the 4th step.
Phase error with transmission channel is that 95 degree are the operation steps that example is introduced the transmitting-receiving subassembly phase error compensation of the present invention's proposition:
1. calculate that according to the requirement of radar installations the phase relation between transmission channel is a zero degree;
2. utilize vector network analyzer to measure the transmission channel phase error, the phase error theta when obtaining frequency of operation and being 33GHz between two transmission channels of transmitting-receiving subassembly
1Be 95 degree.
3. the rectangular parallelepiped ceramic dielectric of selective rule loads, and thickness is 0.5 millimeter, and width and sidewall wide with shielding cavity fully contacts with the shielding cavity metal sidewall, and air shielding cavity height is 3 millimeters, is convenient to calculate the rectangular structure of choosing no transition section.At this moment, the effective dielectric constant ε of this structure
ReBe 1.583.
4. confirm the length l of phase compensation section according to formula (1)
1, phase error theta
1Be 95 degree, λ when frequency of operation is 33GHz
0Be 9.09 millimeters, effective dielectric constant ε
ReBe 1.583, these known parameters substitution formula (1) can be got
5. utilizing means such as mechanical wires cutting to obtain required length is 9.3 millimeters rectangular parallelepiped loaded medium, utilizes the low-loss glue that do not influence electromagnetic transmission that loaded medium is fixed on the final power amplifier chip and promotes to play between the level amplifier chip above the microstrip line of cascade effect.
6. the utilization network analyzer is measured the transmission channel phase error once more; Compensation back phase error can satisfy the millimeter wave active antenna system index requirement of 5 degree; Fig. 4-1 is 95 to utilize the phase error measured result before and after the medium loaded microstrip line method compensation that the present invention proposes when spending for the channel phases error, and compensation back frequency of operation is that the channel phases error of 33GHz is 1.37 degree.
6. utilize the receiving cable phase error of same procedure compensation transmitting-receiving subassembly.
Phase error with transmission channel is that 50 degree are that example is introduced the transmitting-receiving subassembly phase error compensation operation steps that the present invention proposes, and its concrete operations step is consistent with embodiment 1, and just compensator section length is different.Suppose phase error theta
2Be 50 degree, λ when frequency of operation is 33GHz
0Be 9.09 millimeters, effective dielectric constant ε
ReBe 1.583, these known parameters substitution formula (1) can be got
Carry out phase compensation according to the operation steps among the embodiment 1; Fig. 4-2 is 50 to utilize the phase error measured result before and after the medium loaded microstrip line method compensation that the present invention proposes when spending for the channel phases error, and compensation back frequency of operation is that the channel phases error of 33GHz is 2.21 degree.
Phase error with transmission channel is that 35 degree are that example is introduced the transmitting-receiving subassembly phase error compensation operation steps that the present invention proposes, and its concrete operations step is consistent with embodiment 1, and just compensator section length is different.Suppose phase error theta
3Be 35 degree, λ when frequency of operation is 33GHz
0Be 8.57 millimeters, effective dielectric constant ε
ReBe 1.583, these known parameters substitution formula (1) can be got
Carry out phase compensation according to the operation steps among the embodiment 1; Fig. 4-3 is 35 to utilize the phase error measured result before and after the medium loaded microstrip line method compensation that the present invention proposes when spending for the channel phases error, and compensation back frequency of operation is that the channel phases error of 33GHz is 4.57 degree.
Embodiment 4
With the frequency of operation is that 36GHz is that example is introduced the transmitting-receiving subassembly phase error compensation operation steps that the present invention proposes, and its concrete operations step is consistent with embodiment 1, and just compensator section length is different.Suppose phase error theta
4Be 95 degree, λ when frequency of operation is 36GHz
0Be 8.33 millimeters, effective dielectric constant ε
ReBe 1.583, these known parameters substitution formula (1) can be got
Carry out phase compensation according to the operation steps among the embodiment 1.
Embodiment 5
To select teflon for use is that example is introduced the transmitting-receiving subassembly phase error compensation operation steps that the present invention proposes, and its concrete operations step is consistent with embodiment 1, and just dielectric material and compensator section length are different.Suppose phase error theta
5Be 35 degree, λ when frequency of operation is 33GHz
0Be 9.09 millimeters, effective dielectric constant ε
ReBe 1.094, these known parameters substitution formula (1) can be got
Carry out phase compensation according to the operation steps among the embodiment 1.
Claims (14)
1. a millimeter wave miniaturized multichannel transmitting-receiving subassembly device comprises transmitting branch, receiving branch, switch, merit parallel circuit and metal case, it is characterized in that:
1) transmitting branch in the said assembly apparatus, receiving branch, switch, merit parallel circuit are the millimeter wave whole plane integrated circuit that is the basis with the MMIC technology;
2) transmitting branch; The phase compensating network that includes source amplifier and constitute by medium loaded microstrip line; It is characterized in that: activated amplifier comprises final power amplifier; Loaded medium is arranged in metal case inside and the air shielding cavity above microstrip line, is arranged on transmitting branch merit parallel circuit output stage afterwards to the input stage microstrip line before of final power amplifier;
3) receiving branch; The phase compensating network that includes source amplifier, frequency mixer and constitute by medium loaded microstrip line; It is characterized in that: loaded medium is arranged in metal case inside and the air shielding cavity above microstrip line, is arranged on receiving branch merit parallel circuit output stage afterwards to the input stage microstrip line before of frequency mixer;
4) activated amplifier in transmitting branch and the receiving branch is realized by high performance mmic chip.
2. a kind of millimeter wave miniaturized multichannel according to claim 1 is sent out assembly apparatus; It is characterized in that: wherein transmitting branch also comprises the promotion stage power amplifier, and this promotes stage power amplifier and confirms according to the performance number that said final power amplifier needs promote.
3. a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 1, the activated amplifier that it is characterized in that receiving branch is a low noise amplifier, low noise amplifier uses choosing according to the receiver gain of system requirements of number to confirm.
4. a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 1 is characterized in that: the loaded medium in the described phase compensating network is the high dielectric constant of the little and specific inductive capacity of the loss angle of millimeter wave frequency band greater than air.
5. a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 4, wherein, loaded medium is teflon, ceramic powders or pottery.
6. a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 1 is characterized in that: loaded medium is suitable be arranged on the microstrip line conductor belt directly over, the medium both sides closely link to each other with the shielding cavity sidewall.
7. a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 1, wherein, the loaded medium of phase compensating network is an arbitrary shape.
8. a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 6 is characterized in that: the suitable shape of loaded medium is the rectangular shape of selective rule.
9. a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 6 is characterized in that: the transition network of loading stepped shape or ramped shaped in the medium both sides, transition network length is changeable as required.
10. a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 1, wherein, phase compensating network is characterised in that: under the condition that microstrip line length allows, the interchannel phase compensation scope of realization is the 0-360 degree.
11. the channel phases error compensating method of a millimeter wave miniaturized multichannel transmitting-receiving subassembly device, said method comprises:
1) calculates the phase relation requirement between each transceiver channel according to the requirement of radar installations;
2) measure transmitting branch and obtain the channel phases error;
3) loaded medium is set in transmitting branch, to constitute phase compensating network;
4) measure receiving branch and obtain the channel phases error;
5) loaded medium is set in transmitting branch, to constitute phase compensating network.
12. the channel phases error compensating method of a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 11, wherein, loaded medium is the high dielectric constant of the little and specific inductive capacity of the loss angle of millimeter wave frequency band greater than air.
13. the channel phases error compensating method of a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 11; It is characterized in that: for guaranteeing the predictability of phase compensation; The suitable shape of loaded medium is the rectangular shape of selective rule, and the length calculation formula does
Wherein, b is the length of phase compensation section, and θ is the known phase error, λ
0Be the microstrip line guide wavelength of air dielectric, ε
ReBe relative dielectric constants such as propagation medium.
14. the channel phases error compensating method of a kind of millimeter wave miniaturized multichannel transmitting-receiving subassembly device according to claim 11; It is characterized in that: phase compensating method can be applied to all frequency ranges; According to the different working frequency; The corresponding phase compensation value of identical loaded medium length changes to some extent, and its value does
Wherein, θ is the known phase error, and b is the length of phase compensation section, λ
0Be the microstrip line guide wavelength of air dielectric, ε
ReBe relative dielectric constants such as propagation medium.
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| CN1808765A (en) * | 2006-02-20 | 2006-07-26 | 浙江大学 | Micro electric controlled beam scanning array microstrip antenna made of BST ceramic material |
| CN1995903A (en) * | 2006-01-05 | 2007-07-11 | 中国科学院上海微系统与信息技术研究所 | Resistance differential type small-sized double antenna fuze |
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2007
- 2007-11-21 CN CN2007101778513A patent/CN101236246B/en not_active Expired - Fee Related
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| US4739331A (en) * | 1985-10-09 | 1988-04-19 | Westinghouse Electric Corp. | Channelized receiver continuous wave radar system |
| CN1284761A (en) * | 1999-08-16 | 2001-02-21 | 波音公司 | Monolithic microwave integrated circuit-waveguide radio frequency transistion structure and correlation method |
| CN2487120Y (en) * | 2001-03-28 | 2002-04-17 | 信息产业部电子第五十四研究所 | Overwide band multipole automatic tracing antenna |
| CN1638190A (en) * | 2003-12-17 | 2005-07-13 | 微软公司 | Low-cost, steerable, phased array antenna |
| CN1995903A (en) * | 2006-01-05 | 2007-07-11 | 中国科学院上海微系统与信息技术研究所 | Resistance differential type small-sized double antenna fuze |
| CN1808765A (en) * | 2006-02-20 | 2006-07-26 | 浙江大学 | Micro electric controlled beam scanning array microstrip antenna made of BST ceramic material |
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| CN101236246A (en) | 2008-08-06 |
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