The present disclosure relates to the technical field of antenna structures for mobile terminals, and in particular, to a millimeter wave array antenna and a mobile terminal.
In order to meet the development of future communication industry, researches have been made on 5G millimeter wave array antennas for handheld devices. In order to obtain better performance, high gain, low side lobes and wide band, miniaturized array antennas are the goal we pursue. Among them, there is a certain difficulty in designing a dual-band dual-polarized array for a terminal.
At present, researches on an array implementing both dual-band and dual-polarization are few in the field of millimeter wave band. The bandwidth covered by both 28 GHz and 39 GHz is narrow, cross-polarization generated by dual polarization is relatively poor; and the volume is a not ideal to some extent.
The present disclosure will now be described in detail in conjunction with
A first aspect of the present disclosure relates to a millimeter wave array antenna for a mobile terminal. The mobile terminal may be, for example, a mobile phone, a computer or a tablet. As shown in
The antenna element 110 of the embodiment has a double-layer radiating patch, which includes a first radiating patch 111 and a second radiating patch 112. The first radiating patch 111 is spaced apart from and coupled to the second radiating patch 112. In this way, the dual-band coverage of the millimeter wave band may be realized without enlarging the structure of the millimeter wave array antenna 100 thereby improving the dual-band bandwidth. Moreover, coupling with and feeding to the two feeding notches 112a1, 112a2 of the feed end 112a may be achieved by means of the provided power divider layer 114. Each of the antenna elements 110 generates orthogonal polarization and dual-band resonance under excitation of the two input ports IN1, IN2.
It should be noted that there is no limitation on how to realize the structure in which the first radiation patch 111 is spaced apart from and coupled to the second radiating patch 112. For example, a dielectric slab or a structure similar to the dielectric slab may be arranged between the first radiation patch 111 and the second radiation patch 112, etc.
Specifically, as shown in
In order to improve the communication performance of the millimeter wave array antenna 100, dielectric constants of the first dielectric slab 116, the second dielectric slab 117 and the third dielectric slab 118 may range from 2 to 4. Of course, in practical application, those skilled in the art may also select other values for dielectric constants according to practical requirements.
In order to improve the communication performance of the millimeter wave array antenna 100, loss angle tangent values of the first dielectric slab 116, the second dielectric slab 117 and the third dielectric slab 118 may range from 0.0005 to 0.0015. Of course, in practical application, those skilled in the art may also select other values for the loss angle tangent value according to practical requirements.
As shown in
As shown in
As shown in
As shown in
In order to make the structure of the millimeter wave array antenna 100 more compact and reduce the manufacturing cost of the millimeter wave array antenna 100, the second grounding plates 115 of respective antenna elements 110 may be integrally formed.
In the millimeter wave array antenna 100 of the present disclosure, a dual-band coverage of the millimeter wave band may be realized, thereby enhancing the dual-band bandwidth without enlarging the structure of the millimeter wave array antenna 100. Moreover, it is also possible to generate a zero point on the main lobe means of the provided power divider layers 114, thereby increasing the cross polarization ratio, as shown with reference to
A second aspect of the present disclosure provides a mobile terminal which includes the millimeter wave array antenna 100 described above.
The mobile terminal of the present embodiment includes the millimeter wave array antenna 100 described above. The millimeter wave array antenna 100 includes a double-layer radiation patch, the double-layer radiation patch comprises a first radiation patch 111 and a second radiation patch 112, and the first radiation patch 111 is spaced apart from and coupled to and the second radiation patch 112, so that a dual-band coverage for the millimeter wave band may be realized without enlarging the structure of the millimeter wave array antenna 100, thereby increasing the dual-band bandwidth. Moreover, it is also possible to use the provided power divider layers 114, which includes two transmission lines 114a, 114b, where, the transmission line 114a includes an input port IN1 and two phase-inverted output ports OUT1, OUT2 electrically connected with the input port IN1, and the transmission line 114b includes an input port IN2 and two phase-inverted output ports OUT3, OUT4 electrically connected with the input port IN2. The phase-inverted output ports OUT1, OUT2 are respectively coupling-fed the two feeding notches 112b1, 112b2 of the feeding end 112b, and the phase-inverted output ports OUT3, OUT4 are respectively coupling-fed the two feeding notches 112a1, 112a2 of the feeding ends 112a. Each of the antenna elements 110 generates orthogonal polarization and dual-band resonance under excitation of the two input ports IN1, IN2.
The above only describes embodiments of the present disclosure, and it should be noted that those skilled in the art may make improvements to the embodiments without departing from the inventive concept, which all fall within the protection scope of the present disclosure.
Number | Date | Country | Kind |
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201811628344.1 | Dec 2018 | CN | national |
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Entry |
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1st Office Action dated Apr. 20, 2020 by SIPO in related Chinese Patent Application No. 201811628344.1 (10 Pages). |
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Number | Date | Country | |
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20200212596 A1 | Jul 2020 | US |