CN109149130A - Active phase array antenna receive-transmit system - Google Patents
Active phase array antenna receive-transmit system Download PDFInfo
- Publication number
- CN109149130A CN109149130A CN201810830077.XA CN201810830077A CN109149130A CN 109149130 A CN109149130 A CN 109149130A CN 201810830077 A CN201810830077 A CN 201810830077A CN 109149130 A CN109149130 A CN 109149130A
- Authority
- CN
- China
- Prior art keywords
- signal
- antenna
- transmitting
- radio frequency
- receiving
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/28—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the amplitude
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
- H01Q3/26—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
Abstract
The invention discloses a kind of active phase array antenna receive-transmit systems, and using the present invention, not only transmitting/receiving channel number is less, and implementation complexity is low with manufacturing cost, and can effectively reduce the volume power consumption of antenna.The technical scheme is that: active phased array transmitting antenna by successively M transmitting interconnected or receives antenna element group, radio frequency exchange network, the transmitting of the road N signal or receiving channel, signal distributor and forms with radio frequency exchange network, the wave control device that signal emits or receiving channel is connected with active phased array receiving antenna；When transmitting or reception signal, the width phase control signal that signal transmitting or receiving channel are sent according to wave control device, it adjusts every road transmitting or receives the amplitude and phase of signal, the antenna selection signals that radio frequency exchange network is sent according to wave control device, one of transmission antenna unit group or receiving antenna unit group is selected to emit or receive electromagnetic wave, so that radiation or received electromagnetic wave form wave beam in a desired direction.
Description
Technical field
The present invention relates to radio field of array antennas, and in particular to a kind of the active phased array transmitting and reception of low cost
Antenna system.
Background technique
Phased-array technique is the technology for controlling the phase of array antenna each unit, amplitude to form spatial beams.Due to wave
The formation and movement of beam are controlled by computer completely, therefore desired beam shape, number of beams and wave beam may be implemented
Inertialess scanning.Antenna is a kind of equipment to emit and receive electromagnetic energy.In many occasions, by single radiator structure
At antenna can complete well emit and receive electromagnetic energy task.There are many pattern of single radiator, can be letter
Single dipole or loop antenna is also possible to complicated paraboloidal-reflector antenna.Which kind of radiating element work frequency is depended on using
Band, environment, manufacturing cost and many other factors.Some special-purposes such as require antenna to have stronger directionality and higher
Gain, it is desirable that the directional diagram of antenna can scan or with other special performances, at this moment single radiator is often difficult to be competent at,
The main method solved the problems, such as is using the aerial array for being arranged by certain way by multiple radiators and being formed.Antenna array has more
Kind, linear array, planar array and space battle array etc. are had according to the spread pattern of unit.Although each unit of composition aerial array in principle may be used
To be different types, but still pattern is not identical for each unit of aerial array in the case where most of practical applications, and
Its orientation is also identical.Phased array antenna be divided into it is active and passive, active phase array antenna be it is a kind of be known as T/R mould group reception with
Emitter.In recent years, as the design of high band system, device manufacture, technique integrate, test the progress of verification technique, and
The tight demand of the applications such as 5G mobile communication, unmanned automatic driving, active phased array become the new forward position skill in current antenna field
Art hot spot, but since active phase array antenna port number is more, working frequency and implementation complexity are high, cost is to restrict it further
Widely applied primary factor.Wherein cost is concentrated mainly on active transmitting/receiving channel (T/R component), in the base of chip
It also needs to take further low-cost design method on plinth.
Summary of the invention
Object of the present invention is to places in view of the shortcomings of the prior art, and it is relatively easy to provide a kind of structure, at low cost
Active phase array antenna receive-transmit system.
Above-mentioned purpose of the invention can be reached by the following measures, a kind of active phase array antenna receive-transmit system, packet
It includes: active phased array transmitting antenna and active phased array receiving antenna, it is characterised in that: when transmitting signal, signal distributor will
Input transmitting signal is separately sent to the road N signal transmission channel, the width that signal transmission channel is sent according to wave control device after being divided into the road N
Phase control signal adjusts the amplitude and phase of every road transmitting signal, the day line options that radio frequency exchange network is sent according to wave control device
Signal selects one of transmission antenna unit group so that it includes N number of transmission antenna unit and the road N signal transmission channel
It connects one to one, the road N transmitting signal adjusted is transmitted to N number of transmission antenna unit by radio frequency exchange network, so that N number of
The electromagnetic wave that transmission antenna unit gives off forms wave beam in a desired direction；
When receiving signal, the antenna selection signals that radio frequency exchange network is sent according to wave control device select one of receiving antenna
Unit group so that it includes N number of receiving antenna unit connect one to one with the road N signal receiving channel, and by N number of reception
The signal that antenna element receives is transmitted to the road N signal receiving channel, and signal receiving channel sends phased according to wave control device
Signal processed adjusts every road and receives the amplitude of signal and phase and be sent to signal combiner, and signal combiner is to the road N adjusted
It receives signal to be synthesized, so that the reception signal after synthesis forms wave beam in a desired direction.
The present invention has the following beneficial effects: compared with prior art
It is at low cost.The present invention passes through radio frequency exchange network using the M transmitting or receiving antenna unit group of same form is contained
Connected signal distributor or signal synthesizer, and the wave control device structure being connected in parallel between radio frequency exchange network and signal distributor
At active phased array transmitting antenna and active phased array receiving antenna, with the layout of different transmit/receive antenna unit groups and
Directional diagram can be optimized for partial coverage, required in antenna gain situation identical with coverage area
Transmitting/receiving channel number active phase array antenna system equal with transmitting/receiving channel number less than traditional antenna element number,
The manufacturing cost of antenna can be significantly reduced.
Structure is relatively easy.The present invention uses the active phased array transmitting antenna and active phase of essentially identical circuit structure
Input transmitting signal or reception are received signal by signal distributor or signal synthesizer and sent out through the road N signal by battle array receiving antenna
Penetrate channel and be sent directly into radio frequency exchange network, the day line options that radio frequency exchange network sends or receives according to wave control device one of them
Transmission antenna unit group or the transmitting of receiving antenna unit group or received electromagnetic wave, meanwhile, wave control device is logical by the transmitting of the road N signal
Road or the road N signal receiving channel adjust every road transmitting signal or receive the amplitude and phase of signal, by width phase control adjusted
Signal is sent to radio frequency exchange network, and radio frequency exchange network is by the transmitting signal after selection or receives signal and is pushed to transmitting antenna
The N number of transmission antenna unit or receiving antenna unit that unit group or receiving antenna unit group are included, so that N number of transmitting antenna list
Member or receiving antenna unit gives off or received electromagnetic wave forms wave beam in a desired direction, not only transmitting/receiving channel
Number is less, and implementation complexity is low, and can effectively reduce the volume of antenna, reduces power consumption.
Present invention is particularly suitable for application in active phased array transmittings to design with receiving antenna.
Detailed description of the invention
To keep the technical problems solved, the adopted technical scheme and the technical effect achieved by the invention clearer, below
It will the technical scheme of the embodiment of the invention will be described in further detail in conjunction with attached drawing, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, remaining personnel is not making
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
Fig. 1 is active phased array transmitting antenna circuit theory schematic diagram of the invention.
Fig. 2 is active phased array receiving antenna circuit theory schematic diagram of the invention.
Fig. 3, which is that one, radio frequency exchange network shown in Fig. 1 and Fig. 2 is illustrative, implements block diagram.
Fig. 4 is transmission antenna unit one illustrative implementation block diagram shown in Fig. 1.
Fig. 5 is receiving antenna unit one shown in Fig. 2 illustrative implementation block diagram.
Specific embodiment
Refering to fig. 1.In the embodiment described below, active phase array antenna receive-transmit system, comprising: include radio frequency exchange
The active phased array transmitting antenna of network and wave control device and active phased array receiving antenna, active phased array transmitting antenna is by successively
M transmission antenna unit group interconnected, radio frequency exchange network, the road N signal transmission channel, signal distributor and with penetrate
The connected wave control device of frequency exchange network, signal transmission channel, wherein active phased array transmitting antenna is by successively M interconnected
A transmission antenna unit group, radio frequency exchange network, the road N signal transmission channel, signal distributor and with radio frequency exchange network,
The connected wave control device composition of signal transmission channel, each transmission antenna unit group includes N number of transmission antenna unit.Each transmitting day
The transmission antenna unit number that line unit group is included is identical as signal transmission channel number, and total transmission antenna unit number is greater than signal
Transmission channel number, each transmission antenna unit group can use different distribution forms or different unit forms.
When emitting signal, input transmitting signal is divided into behind the road N that be separately sent to the transmitting of the road N signal logical by signal distributor
Road, the width phase control signal that signal transmission channel is sent according to wave control device adjust the amplitude and phase of every road transmitting signal, radio frequency
The antenna selection signals that exchange network is sent according to wave control device select one of transmission antenna unit group so that it includes N
A transmission antenna unit connects one to one with the road N signal transmission channel, and radio frequency exchange network is by the road N transmitting signal adjusted
It is transmitted to N number of transmission antenna unit, so that the electromagnetic wave that N number of transmission antenna unit gives off forms wave in a desired direction
Beam；Wherein M, N are natural number, similarly hereinafter.
Refering to Fig. 2.Active phased array receiving antenna, which uses, is similar to the circuit structure side that active phased array connects transmitting antenna
Formula, by successively M receiving antenna unit group interconnected, radio frequency exchange network, the road N signal receiving channel, signal synthesizer,
And the wave control device composition being connected with radio frequency exchange network, signal receiving channel, each receiving antenna unit group includes N number of reception
Antenna element.The receiving antenna unit number that each receiving antenna unit group is included is identical as signal transmission channel number, and total connects
It receives antenna element number and is greater than signal receiving channel number, each receiving antenna unit group can use different distribution form or difference
Unit form；When receiving signal, the antenna selection signals that radio frequency exchange network is sent according to wave control device select one of them to connect
Receive antenna element group so that it includes N number of receiving antenna unit connect one to one with the road N signal receiving channel, and by the N
The signal that a receiving antenna unit receives is transmitted to the road N signal receiving channel, and signal receiving channel is sent according to wave control device
Width phase control signal adjusts every road and receives the amplitude of signal and phase and be sent to signal combiner, and signal combiner is to adjustment
The road N afterwards receives signal and is synthesized, so that the reception signal after synthesis forms wave beam in a desired direction.
Refering to Fig. 3.Radio frequency exchange network included in active phased array transmitting antenna and active phased array receiving antenna,
A switch is selected to form by N number of M of a switch controller parallel connection.Each M selects the front end interface of a switch to send out with M antenna
/ receiving unit interconnection is penetrated, each M selects the back end interface of a switch to be connected with each other with transmitting all the way/receiving channel.For having
Source phased array transmitting antenna, switch front end interface are the signal output end of radio frequency exchange network, switch back end interface as radio frequency friendship
The signal input part of switching network；For active phased array receiving antenna, it is defeated to switch the signal that front end interface is radio frequency exchange network
Enter end, switch back end interface is the signal output end of radio frequency exchange network.Switch controller is generated according to the wave control device received
Antenna selection signals, control M selects a switch to switch over, so that selected N number of transmit/receive antenna unit and the road N are sent out
Signal path is penetrated/receives to connect one to one.
Refering to Fig. 4.Each transmission antenna unit included in active phased array transmitting antenna is by the radio frequency that is serially connected
Radiator and power amplifier form；Transmitting radiofrequency signal is sent into radio frequency radiator after amplifying by power amplifier and gives off electricity
Magnetic wave, effect is can to further decrease transmitting feeder loss.
Refering to Fig. 5.Each receiving antenna unit included in active phased array receiving antenna is by the radio frequency that is serially connected
Receiver and low-noise amplifier form.Feeding low noise is put after the electromagnetic wave received is converted to electric signal by radio frequency receiver
Big device, low-noise amplifier export amplified reception radiofrequency signal, and effect is can to further decrease reception feeder loss.
Claims (10)
1. a kind of active phase array antenna receive-transmit system, comprising: active phased array transmitting antenna and active phased array receiving antenna,
It is characterized by: input transmitting signal is divided into behind the road N by signal distributor is separately sent to the transmitting of the road N signal when transmitting signal
Channel, the width phase control signal that signal transmission channel is sent according to wave control device adjust the amplitude and phase of every road transmitting signal, penetrate
The antenna selection signals that frequency exchange network is sent according to wave control device select one of transmission antenna unit group, so that it includes
N number of transmission antenna unit connect one to one with the road N signal transmission channel, radio frequency exchange network is by the transmitting adjusted of the road N
Signal is transmitted to N number of transmission antenna unit, so that the electromagnetic wave that gives off of N number of transmission antenna unit shape in a desired direction
At wave beam；
When receiving signal, the antenna selection signals that radio frequency exchange network is sent according to wave control device select one of receiving antenna
Unit group so that it includes N number of receiving antenna unit connect one to one with the road N signal receiving channel, and by N number of reception
The signal that antenna element receives is transmitted to the road N signal receiving channel, and signal receiving channel sends phased according to wave control device
Signal processed adjusts every road and receives the amplitude of signal and phase and be sent to signal combiner, and signal combiner is to the road N adjusted
It receives signal to be synthesized, so that the reception signal after synthesis forms wave beam in a desired direction.
2. active phase array antenna receive-transmit system as described in claim 1, it is characterised in that: active phased array transmitting antenna with
Active phased array receiving antenna is by successively M transmitting interconnected or receives antenna element group, radio frequency exchange network, the road N letter
Number transmitting or receiving channel, signal distributor and with radio frequency exchange network, signal transmitting or the wave control device that is connected of receiving channel
Composition, each transmitting or receiving antenna unit group include N number of transmitting or receiving antenna unit, and wherein M, N are natural number.
3. active phase array antenna receive-transmit system as described in claim 1, it is characterised in that: each transmission antenna unit group or
The transmission antenna unit number or receiving antenna unit number that receiving antenna unit group is included connect with signal transmission channel number or signal
It is identical to receive port number.
4. active phase array antenna receive-transmit system as described in claim 1, it is characterised in that: transmission antenna unit receives day
Line unit is connected one to one by radio frequency exchange network and signal transmission channel or signal receiving channel；Each transmitting antenna list
Tuple or receiving antenna unit group use different distribution forms or different unit forms.
5. active phase array antenna receive-transmit system as described in claim 1, it is characterised in that: active phased array transmitting antenna with
Radio frequency exchange network included in active phased array receiving antenna selects a switch by N number of M of a switch controller parallel connection
Composition.
6. active phase array antenna receive-transmit system as claimed in claim 5, it is characterised in that: each M in radio frequency exchange network
The front end interface of a switch is selected to be connected with each other with M antenna transmitter/receiver unit, each M selects the back end interface and one of a switch
Road transmitting/receiving channel is connected with each other.
7. active phase array antenna receive-transmit system as described in claim 1, it is characterised in that: emit day for active phased array
Line, switch front end interface are the signal output end of radio frequency exchange network, and switch back end interface is that the signal of radio frequency exchange network is defeated
Enter end；For active phased array receiving antenna, the signal input part that front end interface is radio frequency exchange network is switched, is terminated after switch
Mouth is the signal output end of radio frequency exchange network.
8. active phase array antenna receive-transmit system as described in claim 1, it is characterised in that: switch controller is according to receiving
Wave control device generate antenna selection signals, control M select a switch to switch over so that selected N number of transmit/receive antenna
Unit connects one to one with the road N transmitting/receiving signal channel.
9. active phase array antenna receive-transmit system as described in claim 1, it is characterised in that: in active phased array transmitting antenna
The each transmission antenna unit for being included is made of the radio frequency radiator being serially connected with power amplifier, and transmitting radiofrequency signal is logical
Radio frequency radiator is sent into after the amplification of overpower amplifier and gives off electromagnetic wave, to reduce transmitting feeder loss.
10. active phase array antenna receive-transmit system as described in claim 1, it is characterised in that: active phased array receiving antenna
Included in each receiving antenna unit be made of the radio frequency receiver being serially connected with low-noise amplifier；Radio frequency receiver
It is sent into low-noise amplifier after the electromagnetic wave received is converted to electric signal, the amplified reception of low-noise amplifier output is penetrated
Frequency signal, to reduce reception feeder loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810830077.XA CN109149130A (en) | 2018-07-26 | 2018-07-26 | Active phase array antenna receive-transmit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810830077.XA CN109149130A (en) | 2018-07-26 | 2018-07-26 | Active phase array antenna receive-transmit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109149130A true CN109149130A (en) | 2019-01-04 |
Family
ID=64799197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810830077.XA Pending CN109149130A (en) | 2018-07-26 | 2018-07-26 | Active phase array antenna receive-transmit system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109149130A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383318A (en) * | 2020-11-11 | 2021-02-19 | 西安电子工程研究所 | Serial-type transceiving front-end switch array for linear array |
| CN115499041A (en) * | 2022-11-14 | 2022-12-20 | 深圳芯盛思技术有限公司 | Client equipment adopting phased array technology |
| CN115954648A (en) * | 2022-12-29 | 2023-04-11 | 北京万集科技股份有限公司 | RSU antenna and electronic toll collection system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101154975A (en) * | 2006-09-30 | 2008-04-02 | 大唐移动通信设备有限公司 | Method and switching control device for obtaining channel condition information in TDD system |
| CN102683899A (en) * | 2012-05-19 | 2012-09-19 | 中国电子科技集团公司第十研究所 | Other vector rotation calibration method for phased array antenna |
| CN102856667A (en) * | 2012-09-06 | 2013-01-02 | 上海瀚讯无线技术有限公司 | Multi-beam antenna system |
| CN105866747A (en) * | 2016-05-11 | 2016-08-17 | 中国电子科技集团公司第三十八研究所 | Active phased array radar transmit-receive component and manufacturing method thereof |
| CN106443659A (en) * | 2016-08-25 | 2017-02-22 | 四川九洲空管科技有限责任公司 | Low level small speed small target detection radar device and detection method thereof |
-
2018
- 2018-07-26 CN CN201810830077.XA patent/CN109149130A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101154975A (en) * | 2006-09-30 | 2008-04-02 | 大唐移动通信设备有限公司 | Method and switching control device for obtaining channel condition information in TDD system |
| CN102683899A (en) * | 2012-05-19 | 2012-09-19 | 中国电子科技集团公司第十研究所 | Other vector rotation calibration method for phased array antenna |
| CN102856667A (en) * | 2012-09-06 | 2013-01-02 | 上海瀚讯无线技术有限公司 | Multi-beam antenna system |
| CN105866747A (en) * | 2016-05-11 | 2016-08-17 | 中国电子科技集团公司第三十八研究所 | Active phased array radar transmit-receive component and manufacturing method thereof |
| CN106443659A (en) * | 2016-08-25 | 2017-02-22 | 四川九洲空管科技有限责任公司 | Low level small speed small target detection radar device and detection method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112383318A (en) * | 2020-11-11 | 2021-02-19 | 西安电子工程研究所 | Serial-type transceiving front-end switch array for linear array |
| CN115499041A (en) * | 2022-11-14 | 2022-12-20 | 深圳芯盛思技术有限公司 | Client equipment adopting phased array technology |
| CN115954648A (en) * | 2022-12-29 | 2023-04-11 | 北京万集科技股份有限公司 | RSU antenna and electronic toll collection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5764123B2 (en) | Amplitude and phase compensated multi-element antenna array with adaptive predistortion for wireless networks | |
| CN111245492A (en) | Joint beam training and intelligent reflecting surface selection method based on received power sequencing | |
| TW554570B (en) | Antenna system for use in a wireless communication system | |
| WO2014204070A1 (en) | Method and apparatus for forming beam in antenna array | |
| CA2908539A1 (en) | Multiple beam antenna systems with embedded active transmit and receive rf modules | |
| CN108134216B (en) | Antenna array simulating beam forming | |
| CN109149130A (en) | Active phase array antenna receive-transmit system | |
| CN101842714A (en) | Communication system and method using an active phased array antenna | |
| US11962072B2 (en) | Phased array antennas having switched elevation beamwidths and related methods | |
| WO2018103677A1 (en) | Microwave antenna array communication system and communication method | |
| KR101127147B1 (en) | Broadband antenna system for broadband polarization reconfiguration and method for transmitting signal using it | |
| CN110034394A (en) | More fed patch antennas and device including more fed patch antennas | |
| JP5796759B2 (en) | Active phased array antenna device | |
| CN111869004A (en) | Base station antenna supporting high Effective Isotropic Radiated Power (EIRP) with high boresight coverage using linear superposition of amplitude and phase weighting | |
| CN105703084B (en) | A kind of room divided antenna | |
| CN115567147A (en) | Radio interference system | |
| JP7175347B2 (en) | Beamforming device, beamforming system and beam generator | |
| KR100748337B1 (en) | Dual-Polarization Diversity Active Microstrip Antenna | |
| CN108232416B (en) | Dual-polarization CTS beam scanning antenna array | |
| CN107591614B (en) | High-gain omnidirectional array antenna | |
| CN112234343A (en) | Active phased array vehicle-mounted antenna system suitable for high-speed rail | |
| McKinnis et al. | Figures of merit for active antenna enabled 5G communication networks | |
| JPH03254207A (en) | Antenna system | |
| EP1865576B1 (en) | A dual-polar antenna for a base station of mobile radio systems with adjustable azimuth beamwidth | |
| CN112564753B (en) | Self-sensing intelligent antenna |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190104 |