Ceramic antenna used for mobile terminal and production technology

A ceramic antenna and mobile terminal technology, applied in the directions of antennas, antenna parts, antenna supports/installation devices, etc., can solve the problems of complex lamination process, different resonant frequencies, complex production processes, etc., and achieve small size and simplify production. Process, effect of increased risk of short circuit

Pending Publication Date: 2018-02-02
东莞市合康电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are the following disadvantages. On the one hand, the lamination process is extremely complicated. At least several to a dozen layers of ceramic substrates are required. Each layer of ceramic substrates needs to be printed with corresponding patterns, and then all the ceramic substrates are pressed together before sintering. After that, electrodes need to be added, and then electroplating is performed, which makes the production process complicated.
Second, different applications require different resonant frequencies, and LTCC laminated ceramic antennas generally can only achieve one resonant frequency, and the scope of application is narrow
In the third aspect, the volume is relatively large, which is inconsistent with the mainstream trend of miniaturization

Method used

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  • Ceramic antenna used for mobile terminal and production technology
  • Ceramic antenna used for mobile terminal and production technology
  • Ceramic antenna used for mobile terminal and production technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 2 and image 3 Shown are the schematic structural diagram and the test result diagram of the ceramic antenna of the first embodiment, respectively.

[0040] A ceramic antenna 100 for a mobile terminal, comprising a ceramic rod 110, metal terminals 120 located at both ends of the ceramic rod 110, and a metal wire 130 wound on the surface of the ceramic rod 110; the length of the ceramic rod 110 is L, and the ceramic rod The diameter of 110 is D, the dielectric constant is Er, the speed of light is c, the resonant frequency of the ceramic antenna 100 is f, the number of turns of the metal wire 130 around the surface of the ceramic rod 110 is N, and N*π*D+L=2 *c / (Er*f+f).

[0041] The production process of ceramic antenna 100 of the present invention is, comprises the following steps, a, make ceramic rod 110, its diameter is D, and dielectric constant is Er, b, make two metal terminals 120, connect two metal terminals 120 respectively At both ends of the...

Embodiment 2

[0050] Such as Figure 4 and Figure 5 Shown are the schematic structural diagram and the test result diagram of the ceramic antenna of the second embodiment, respectively.

[0051] In this embodiment, the number of turns of the metal wire is 5, and the ceramic antenna is tested, and the test results are as follows Figure 5 . The curve in the figure reflects the voltage standing wave ratio (VSWR), and the position corresponding to the lowest point is the resonant frequency point of the ceramic antenna, indicating the frequency point where the ceramic antenna radiates the best.

[0052] Embodiment 1 and Embodiment 2 illustrate that when different resonance frequencies need to be obtained in different application occasions, it is only necessary to wind metal wires 130 with different numbers of turns on the surface of ceramic rod 110 . The production process is simple and easy to use.

Embodiment 3

[0054] Such as Figure 6 and Figure 7 Shown are the structural schematic diagram and the test result figure of embodiment three respectively.

[0055] In this embodiment, the surface of the ceramic rod 110 is integrally plated with a layer of silver, and then according to the required frequency, a pattern of 5 circles of metal wires 130 is cut on the ceramic rod 110 . The metal wire 130 is directly cut from the surface of the ceramic rod 110 electroplated with a silver-plated layer, no winding is required, the subsequent debugging is convenient, the processing difficulty is further reduced, and the production process is simple.

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Abstract

The invention relates to the antenna field and especially relates to a ceramic antenna used for a mobile terminal and a production technology. The ceramic antenna comprises a ceramic rod, metal terminals located on two ends of the ceramic rod and a metal line winding a ceramic rod surface. A length of the ceramic rod is L, a diameter of the ceramic rod is D, a dielectric constant is Er, a speed oflight is c, a resonant frequency of the ceramic antenna is f, and a number of turns for the metal line to wind the ceramic rod surface is N, wherein the above parameters satisfy the following equation: N*pi*D+L=2*c / (Er*f+f). A production technology of the ceramic antenna is simple, a suitable range is wide and the size is small.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a ceramic antenna for a mobile terminal and a production process thereof. Background technique [0002] The antenna undoubtedly plays a very important role in the RF front-end of mobile terminals such as mobile phones, and is an important component for transmitting and receiving signals. With the rapid development of the wireless communication industry, mobile terminals are endowed with more functions (such as Bluetooth, GPS, dual-mode and UWB, etc.), which means that more and more antennas must be integrated in mobile terminals. At the same time, consumption Those who require multifunctional mobile terminals to be thinner and more reliable, these two trends put forward higher requirements for mobile terminal antennas: antenna embedding and miniaturization, etc., so ceramic antennas appear. [0003] Simply put, the ceramic antenna as a transmitting antenna is to turn the high-frequency e...

Claims

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Application Information

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IPC IPC(8): H01Q1/38H01Q1/50H01Q1/24
CPCH01Q1/243H01Q1/38H01Q1/50
Inventor 尹志强谭欢林
Owner 东莞市合康电子有限公司
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