TWI488363B - Method and apparatus for controlling radiation characteristic of liquid antenna - Google Patents

Description

Method and device for controlling radiation characteristics of liquid antenna

The present invention relates to an antenna technology, and more particularly to a method and apparatus for controlling radiation characteristics of a liquid antenna.

Antennas are an indispensable component of many wireless communication systems, and they are the main components of the overall performance of the system. As handheld electronic devices have evolved toward flexible or flexible electronic devices, antennas are bound to have the same function. For example, there has been a related document indicating that a liquid metal or a liquid alloy can be used as the antenna body to produce an elastic antenna, wherein the liquid metal is composed of, for example, gallium or indium. However, liquid metal materials such as gallium or indium are not only difficult to obtain, and elastic antennas made of these liquid metal materials are also relatively expensive to manufacture. Therefore, the elastic antenna or flexible antenna potential that is not based on liquid metal will become more and more important in the development of antenna technology.

In addition, due to the essential difference in antenna process or conductor material, the physical characteristics of the elastic antenna or the flexible antenna which are not mainly composed of liquid metal are different from those of the conventional metal antenna. Therefore, for an elastic antenna or a flexible antenna that does not use liquid metal as a main material, how to balance the basic performance and design convenience of the antenna has become a major issue in the field of technology.

In view of this, the present invention provides a method and apparatus for controlling radiation characteristics of a liquid antenna, which can effectively control the radiation characteristics of the liquid antenna, and can improve the convenience of design and implementation of the liquid antenna.

The invention provides a radiation characteristic control method for a liquid antenna, which is used for controlling radiation characteristics of a liquid antenna, wherein the liquid antenna comprises an antenna casing, a liquid conductor and a feeding signal contact, and the radiation characteristic control method of the liquid antenna comprises performing an adjustment The program, wherein the adjustment procedure comprises adjusting the specification parameters of the liquid antenna and adjusting the liquid antenna according to the adjusted specification parameters. It is judged whether the adjusted radiation characteristics of the liquid antenna meet the preset radiation characteristics. And, when the adjusted radiation characteristics of the liquid antenna do not conform to the preset radiation characteristics, the adjustment procedure is repeatedly performed.

The invention further provides a radiation characteristic control device for a liquid antenna, which is used for controlling radiation characteristics of a liquid antenna, wherein the liquid antenna comprises an antenna casing, a liquid conductor and a feed signal contact, and the radiation characteristic control device of the liquid antenna comprises an adjustment device And processing device. The adjusting device is configured to perform an adjustment procedure, wherein in the adjusting program, the adjusting device adjusts the specification parameter of the liquid antenna, and adjusts the liquid antenna according to the adjusted specification parameter. The processing device is coupled to the adjusting device for determining whether the adjusted radiation characteristic of the liquid antenna meets the preset radiation characteristic. When the adjusted radiation characteristic of the liquid antenna does not meet the preset radiation characteristic, the processing device controls the adjusting device to repeatedly perform the adjustment. program.

Based on the above, the radiation characteristic control method and apparatus for the liquid antenna of the present invention can adjust the specification parameters of the liquid antenna and according to the adjusted gauge The grid parameters are used to adjust the liquid antenna. Then, according to the adjusted radiation characteristics of the liquid antenna, it is judged whether the specification parameter of the liquid antenna needs to be adjusted until the radiation characteristic of the liquid antenna conforms to the preset radiation characteristic. Thereby, the radiation characteristics of the liquid antenna can be effectively controlled or adjusted, and the convenience of design or implementation of the liquid antenna can be improved.

The above described features and advantages of the present invention will be more apparent from the following description.

1A and FIG. 1B, FIG. 1A is a schematic diagram of a liquid antenna according to an embodiment of the invention. FIG. 1B is a cross-sectional view of a liquid crystal according to an embodiment of the invention. Unlike the conventional metal antenna, the liquid antenna 10 includes an antenna housing 11, a liquid conductor 12, and a feed signal contact 13.

The antenna housing 11 is used to form a sealed space 111 inside the antenna housing 11. In this embodiment, the antenna housing 11 may be an outer casing of any shape such as a rectangular outer casing or a cylindrical outer casing, and the shape of the closed space 111 may be any shape such as a rectangular space or a cylindrical space. space. In addition, the size of the antenna case 11 and the sealed space 111 may be any size. For example, when the antenna housing 11 is a rectangular outer casing, the length, width, height, thickness, and the like of the rectangular outer casing may be determined by consideration of cost or efficiency in implementation. Alternatively, when the antenna housing 11 is a cylindrical outer casing, the length, radius and thickness of the cylindrical outer casing may be determined by consideration of cost or efficiency in implementation. similar The capacity, size, and the like of the sealed space 111 can also be adjusted depending on the cost or efficiency of the implementation.

In the present embodiment, the antenna housing 11 may be composed of one or more dielectric materials, and the material of the dielectric material may be elastic or flexible. For example, the dielectric material of the antenna housing 11 may be plastic, silicone or various film materials or the like. Thereby, the liquid antenna 10 can be applied to various non-hard portable electronic devices or mobile devices. However, the present invention is not limited by the above as an implementation. In another embodiment, a non-elastic dielectric material can also be used as the antenna housing 11.

The liquid conductor 12 is housed in the sealed space 111 and can be used as a radiation medium for emitting a radiation signal by the liquid antenna 10. In general, the composition of the liquid conductor 12 can be roughly divided into two parts, a solute and a solvent. The solute is a substance dissolved in a solvent in the liquid conductor 12. For example, in the present embodiment, the solute may be a solid, liquid or gas solute, and the invention is not limited thereto. Taking a solid solute as an example, it is, for example, a sugar dissolved in water. Taking liquid solute as an example, it is, for example, alcohol dissolved in water. Alternatively, taking a gaseous solute as an example, it is, for example, carbon dioxide dissolved in a carbonated beverage. Correspondingly, the solvent in the liquid conductor 12 is a liquid which can be used to dissolve various solid, liquid or gaseous solutes, and the invention is not limited thereto.

It is worth mentioning that in any solution, both solute and solvent are only a relative concept. For example, under normal conditions, a relatively large amount of material in the liquid conductor 12 may be referred to as a solvent, while a relatively small amount of material in the same liquid conductor 12 may be referred to as a solute. In other words, in this embodiment, the liquid The conductor 12 can be substantially a liquid conductor composed of various solute and solvent, and can be made electrically conductive. For example, the liquid conductor 12 can be a variety of ionic solutions, such as water or sodium chloride (NaCl) solutions, and the like. Further, the liquid conductor 12 may be a liquid conductor including a solute or a solvent such as oil (oil) or liquid metal.

The feed signal contact 13 extends into the interior of the antenna housing 11 (i.e., the enclosed space 111) to contact the liquid conductor 12. The feed signal contact 13 is electrically conductive and can be used to receive the feed signal. For example, the feed signal contact 13 can be a wire or conductor comprising a metal or any electrically conductive material that extends externally into the interior of the antenna housing (ie, the enclosed space 111) to contact or deeper into the liquid conductor 12 to The feed signal is transmitted to the liquid conductor 12.

It should be noted that, in this embodiment, the liquid antenna 10 can be disposed on a substrate for further installation on a mobile phone, a personal digital assistant (PDA), a smart phone, an e-book, and a game machine. Or a portable computer or mobile device such as a tablet PC to transmit and receive radio frequency signals.

For example, FIG. 2 is a schematic diagram of a liquid antenna disposed on a substrate according to an embodiment of the invention. It should be noted here that the composition of the liquid antenna 20 in FIG. 2 is substantially the same or similar to the liquid antenna 10 of FIGS. 1A and 1B, and therefore only the configuration of the liquid antenna 20 will be described herein. In addition, although the antenna housing of the liquid antenna 20 illustrated in FIG. 2 is a cylindrical housing, the antenna housing of the liquid antenna 20 may also substantially be, for example, the above-described rectangular housing, or an outer casing of any shape that provides similar effects.

Referring to FIG. 2, the liquid antenna 20 may be disposed on the substrate 21. The substrate 21 further includes a grounding surface 22 for grounding. The feed signal line 23, such as the inner conductor in the coaxial wire, is electrically connected to the feed signal contact 231, and transmits the feed signal to the liquid conductor in the liquid antenna 20 through the feed signal contact 231 (for example, a liquid state Conductor 12) to emit a feed signal from liquid antenna 20. Or receiving a radio frequency signal from the liquid antenna 23. Further, the feed signal line 23, for example, the outer conductor of the coaxial wire, is connected to the ground plane 22 via a grounding point 232.

However, due to the structural difference between the liquid antenna and the conventional metal antenna, the antenna characteristics of the liquid antenna and the conventional metal antenna are also different. Therefore, in order to facilitate the management and control of the design of the liquid antenna and the radiation characteristics of the liquid antenna, the embodiment of the present invention provides a method for controlling the radiation characteristics of the liquid antenna, which can automatically adjust the specification parameters of the liquid antenna, and according to the adjustment The specifications are used to automatically adjust the liquid antenna. Then, according to the adjusted radiation characteristics of the liquid antenna, it is judged whether the specification parameter of the liquid antenna needs to be adjusted again until the radiation characteristic of the adjusted liquid antenna conforms to the preset radiation characteristic. Thereby, the liquid antenna can be effectively designed or adjusted to meet the required radiation characteristics of the liquid antenna, and the design or implementation convenience of the liquid antenna can be improved.

Furthermore, embodiments of the present invention further disclose a radiation characteristic control apparatus for a liquid antenna that can be used to embody the radiation characteristic control method of the above liquid antenna. In order to make the content of the present invention easier to understand, the following specific embodiments are illustrative of the embodiments of the present invention.

FIG. 3 is a functional block diagram of a radiation characteristic control apparatus for a liquid antenna according to an embodiment of the invention. Referring to FIG. 3, the radiation characteristic control device 30 of the liquid antenna includes an adjustment device 31 and a processing device 32. In this embodiment, the adjusting device 31 is configured to perform an adjustment procedure on the liquid antenna to adjust the radiation characteristics of the liquid antenna. For example, in the adjustment procedure, first, the adjustment device 31 automatically adjusts one or more specification parameters of the liquid antenna.

Specifically, referring to FIG. 1A and FIG. 1B , taking the liquid antenna 10 as an example, the liquid antenna 10 includes at least an antenna casing 11 , a liquid conductor 12 , and a feed signal contact 13 , and the antenna casing 11 , the liquid conductor 12 , and the feed Signal contacts 13 have their own specifications. For example, the specifications of the antenna housing 11 include length, width (or radius), thickness, and/or capacity of the sealed space 111, and the like. The specifications of the liquid conductor 12 are, for example, the concentration, the type of solute, the type of solvent, and the like. Further, the specification of the feed signal contact 13 is, for example, its installation position on the liquid crystal 10 or the like. Therefore, in the embodiment, the specification parameters of the liquid antenna are, for example, various specifications such as a length parameter, a width parameter, a radius parameter, a concentration parameter, and a feed point setting parameter, wherein the length parameter corresponds to the length and width of the antenna housing 11. The parameter corresponds to the width or radius of the antenna housing 11, the concentration parameter corresponds to the concentration of the liquid conductor 12, and the feed point setting parameter corresponds to the set position of the feed signal contact 13. However, the above specification parameters may also be other specification parameters related to the radiation characteristics of the liquid antenna, which is not limited by the present invention.

Referring again to FIG. 3, in the above adjustment procedure, after the adjustment device 31 adjusts the specification parameters of the liquid antenna, the adjustment device 31 can The liquid antenna is automatically adjusted according to the adjusted specifications. For example, in the embodiment, the adjusting device 31 can adjust the length parameter of the liquid antenna, and then adjust the length of the antenna casing according to the adjusted length parameter. For example, when the adjusting device 31 lowers the value of the length parameter of the liquid antenna, the adjusting device 31 can shorten the length of the antenna casing according to the length parameter after the lowering. When the adjusting device 31 increases the value of the length parameter of the liquid antenna, the adjusting device 31 can lengthen the length of the antenna casing according to the length parameter after the height adjustment. The above adjustment manner can be applied to the width parameter or the radius parameter, and the details are not described herein.

Alternatively, the adjusting device 31 can also adjust the concentration parameter of the liquid antenna, and then adjust the concentration of the liquid conductor in the liquid antenna according to the adjusted concentration parameter to change the dielectric constant or conductivity of the liquid conductor. For example, when the adjusting device 31 increases the value of the concentration parameter of the liquid antenna, the adjusting device 31 can increase the ion concentration in the liquid conductor according to the adjusted concentration parameter.

In addition, the feed point setting parameters are represented, for example, by a plurality of different values, and each of the values represents a set position of the feed signal contact on the liquid conductor. After the adjusting device 31 adjusts the feeding point setting parameter, the adjusting device 31 can adjust the setting position of the feeding signal contact on the liquid antenna according to the adjusted feeding point setting parameter. For example, when the feed point setting parameter is adjusted from "1" to "2", the adjustment device 31 can set the feed signal contact point on the liquid antenna, and set the corresponding parameter "1" from the feed point. The position is adjusted to the setting position corresponding to the feed point setting parameter "2".

For example, FIG. 4 is a schematic diagram of adjusting a feed signal contact of a liquid antenna according to an embodiment of the invention. Referring to FIG. 4, in the present embodiment, after the adjustment device (for example, the adjusting device 31) adjusts the set position of the feed signal contact 231 of the liquid antenna 20 in FIG. 2, the adjusted liquid antenna 20 is adjusted. The feed signal contact 431 at another set position is connected to the feed signal line 23. In addition, each position on the liquid crystal 20 is likely to be a set position of the feed signal contact connected to the feed signal line 23, and the present invention is not limited thereto.

In other words, in the present embodiment, one or a combination of various parameters of the liquid antenna and their corresponding length, width or radius of the conductor housing, the concentration of the liquid conductor, and the set position of the feed signal contact are automatically adjusted. The adjusting device 31 can gradually adjust the radiation performance such as the antenna resonance frequency of the liquid antenna so as to gradually approach the desired resonance frequency range.

However, the invention is not limited thereto. Referring to FIG. 3 again, in an embodiment, the adjusting device 31 can also adjust the short-circuit point setting parameter of the liquid antenna, and increase or decrease one or more short-circuit points on the liquid antenna according to the adjusted short-circuit point setting parameter, or Adjust the setting position of the short-circuit point, and then change the radiation characteristics such as the impedance matching characteristics of the liquid antenna. Thereby, by automatically adjusting the short-circuit point setting parameter of the liquid antenna and the structure of the corresponding liquid antenna, the number of short-circuit points or the short-circuit point setting position, the adjusting device 31 can gradually adjust the radiation performance such as impedance matching of the liquid antenna, It gradually approaches the required impedance matching range.

For example, FIG. 5 is a schematic diagram of setting a short circuit point on a liquid antenna according to an embodiment of the invention. Please refer to Figure 5, adjusted The liquid antenna 50 has a short-circuit point 54 and is disposed on the substrate 51 in a manner similar to a U-shaped antenna or a loop-like antenna. With the provision of the shorting point 54, the liquid antenna 50 can have an impedance matching characteristic similar to that of a loop-like antenna. In addition, the ground plane 52, the feed signal line 53, the feed signal contact 531, and the ground point 532 are similar to the ground plane 22, the feed signal line 23, the feed signal contact 231, and the ground point 232, respectively. Therefore, it will not be repeated here.

FIG. 6 is a schematic diagram of setting a short circuit point on a liquid antenna according to another embodiment of the invention. Referring to FIG. 6, the adjusted liquid antenna 60 has a short-circuit point 64 and is disposed on the substrate 61 in a manner similar to a Planar Inverted F Antenna (PIFA). With the provision of the shorting point 64, the liquid antenna 60 can have impedance matching characteristics similar to a planar inverted-F antenna. In addition, the ground plane 62, the feed signal line 63, the feed signal contact 631, and the ground point 632 are similar to the ground plane 22, the feed signal line 23, the feed signal contact 231, and the ground point 232, respectively. Therefore, it will not be repeated here.

Referring to FIG. 3 again, the processing device 32 is coupled to the adjusting device 31 for determining whether the adjusted radiation characteristics of the liquid antenna meet the preset radiation characteristics, and the adjusting device 31 can be controlled to perform the above adjustment procedure. In this embodiment, the processing device 32 may be a micro-controller, an embedded controller, or a central processing unit (CPU), but the implementation manner of the present invention is not limited. Above.

For example, after the adjusting device 31 performs the above adjustment procedure, the processing device 32 determines whether the adjusted radiation characteristics of the liquid antenna meet the preset radiation characteristics. For example, the processing device 32 can measure various radiation characteristics such as the resonant frequency or impedance matching of the adjusted liquid antenna, and compare the measured data with preset data to determine the adjusted radiation of the liquid antenna. Whether the characteristics meet the preset radiation characteristics. Then, when the processing device 32 determines that the adjusted radiation characteristic of the liquid antenna does not conform to the preset radiation characteristic, the processing device 31 can control the adjustment device 31 to use the specification parameter different from the previous use, and repeatedly execute the above adjustment procedure until The adjusted radiation characteristics of the liquid antenna conform to the preset radiation characteristics. Thereby, by automatically and continuously correcting one or more specification parameters of the liquid antenna, the adjusted radiation characteristics of the liquid antenna can gradually approach the preset radiation characteristics.

In addition, the processing device 32 can also determine whether the adjusted radiation characteristics of the liquid antenna meet the preset radiation according to one of the adjusted return loss curve, the operating bandwidth and the radiation efficiency of the adjusted liquid antenna. characteristic. For example, when one of the return loss curve, the operation bandwidth and the radiation efficiency of the adjusted liquid antenna does not conform to the preset radiation characteristic or the preset specification, the processing device 32 controls the adjustment device 31 to repeat. Perform the above adjustment procedure.

The preset radiation characteristics or preset specifications are based on, for example, third generation wireless communication technology (3G), Bluetooth, General Packet Radio Service (GPRS), and high speed download packet access (High Speed Downlink). Packet Access, HSDPA), high High Speed Uplink Packet Access (HSUPA), Wireless-Fidelity (Wi-Fi), Wireless Wide Area Network (WWAN), and 3rd Generation Partnership Project Long Term Evolution The specifications of various types of wireless communication systems, such as 3GPP Long Term Evolution (3GPP LTE), are flexibly formulated, and the present invention is not limited thereto.

FIG. 7 is a graph showing the return loss of a liquid antenna at different lengths according to an embodiment of the invention. This embodiment is an experiment similar to the liquid antenna of FIG. 2 and its configuration. Please refer to FIG. 2 and FIG. 7 at the same time. In detail, this experiment is to change the length specification of the liquid antenna as the main observation focus, and use pure water as the liquid conductor of the liquid antenna. Curve 701 is the return loss curve corresponding to the liquid antenna with a total length of 18 microns, curve 702 is the return loss curve corresponding to the liquid antenna with a total length of 23 microns, and curve 703 is the corresponding liquid crystal antenna with a total length of 50 microns. Return loss curve.

First, as seen by curve 701, a liquid antenna with a total length of 18 microns has a center frequency of the antenna resonant frequency of about 2.4 GHz, which is in line with the current wireless fidelity protocol in the wireless LAN (WLAN) (Wireless LAN, WLAN). Fidelity, WiFi) one of the operating bands (ie, 2400 MHz to 2484 MHz) and its radiation efficiency is about 70%. Next, as seen by curve 702, a liquid antenna having a total length of 23 microns has a center frequency of the antenna resonance frequency of about 2.1 GHz and a radiation efficiency of about 50%. Then, looking at the curve 703, the liquid antenna having a total length of 50 μm has a center frequency of the antenna resonance frequency of about 1.8 GHz and a radiation efficiency of about 30%.

In other words, in the present embodiment, when the total length of the liquid crystal antenna is gradually increased, the center frequency of the resonance frequency of the liquid crystal antenna is gradually lowered, which is quite in accordance with the spirit of the present invention for changing the antenna characteristics of the liquid antenna by adjusting the length parameter. However, it should be noted here that as the total length of the liquid antenna gradually increases, the radiation efficiency also gradually decreases. In addition, pure water has a large dielectric loss value below the antenna resonance frequency of 2.0 GHz, and it is easy to adversely affect the radiation efficiency of the liquid antenna.

FIG. 8 is a graph showing the return loss of a liquid antenna at different liquid conductor concentrations according to an embodiment of the invention. This embodiment is also an experiment similar to the liquid antenna of FIG. 2 and its configuration. Please refer to FIG. 2 and FIG. 8 at the same time. This experiment is to change the concentration specification of the liquid conductor as the main observation point, and the experiment is carried out with a liquid antenna with a total length of 18 micrometers. Curve 801 is the return loss curve corresponding to the liquid antenna whose liquid conductor is a sodium chloride (NaCl) solution and its concentration is 5%, and curve 802 is the return loss curve corresponding to the liquid antenna whose liquid conductor is water.

First, according to the curve 801, the liquid conductor is a sodium chloride (NaCl) solution and its liquid concentration of 5% liquid antenna has a center frequency of the antenna resonance frequency of about 2.4 GHz, which is also in line with the current mainstream wireless area network wireless protection. One of the operating bands of the truth agreement (ie, 2400 MHz to 2484 MHz). Next, as seen by the curve 802, the liquid antenna in which the liquid conductor is pure water has a center frequency of the antenna resonance frequency of about 2.0 GHz.

In other words, in the present embodiment, when the ion concentration of the liquid conductor of the liquid antenna is gradually increased, the center frequency of the resonance frequency of the liquid antenna is gradually decreased, and the antenna of the liquid antenna is also changed according to the present invention by adjusting the concentration parameter. The spirit of character.

FIG. 9 is a flow chart of a method for controlling radiation characteristics of a liquid antenna according to an embodiment of the invention. Referring to FIG. 3 and FIG. 9 simultaneously, before performing the control method corresponding to FIG. 9, the preliminary radiation specifications and component specifications of the liquid antenna may be initially selected according to requirements, wherein the radiation specifications are, for example, antenna resonance frequency or operation bandwidth. The component specifications are, for example, related specifications such as the total length, width, radius, liquid conductor concentration, setting position of the feed signal contact, or presence or absence of a short-circuit point.

First, in step S902, the adjusting device 31 performs an adjustment procedure to adjust one or more specification parameters of the liquid antenna, and adjusts the liquid antenna according to the adjusted one or more specification parameters. Then, proceeding to step S902, in step S904, the processing device 31 determines whether the adjusted radiation characteristics of the liquid antenna conform to the preset radiation characteristics. When the processing device 31 determines that the adjusted radiation characteristic of the liquid antenna does not conform to the preset radiation characteristic, the processing device 31 repeatedly performs step S902 to control the adjusting device 31 to repeatedly perform the adjustment process until the processing device 31 determines the adjustment in step S904. The radiation characteristics of the liquid antenna conform to the preset radiation characteristics.

For the implementation details in the above method, sufficient teachings, suggestions and implementation descriptions can be obtained from the above embodiments, and details are not described herein again.

In addition, it is worth mentioning that the processing device 31 and the adjusting device 31 are, for example, hardware devices composed of logic circuit elements or mechanical devices, but Perform the above functions separately. For example, the radiation characteristic control method of the liquid antenna disclosed in this embodiment may be that a plurality of machines are controlled by a controller, and the liquid antenna is used according to the above description (for example, step S902 to step S904 in FIG. 9). The radiation characteristics are measured, controlled and adjusted. In addition, the processing device 31 and the adjustment device 31 may be a software module or a body program stored in a hard disk or a memory of the radiation characteristic control device 30 of the liquid antenna, which can be loaded into the radiation characteristic control device 30 of the liquid antenna. The processor performs the above functions in a simulation manner. For example, the corresponding radiation characteristics and the like are simulated according to the specification parameters of the liquid antenna, and the present invention is not limited thereto.

In summary, the method and apparatus for controlling the radiation characteristics of the liquid antenna in the embodiment of the present invention can be automatically performed by the adjusting device to adjust the specification parameters of the liquid antenna, and the liquid antenna is adjusted according to the adjusted specification parameters. The structure is adjusted to change the radiation characteristics of the liquid antenna. Then, after the adjustment program is executed, the processing device can determine whether the adjusted radiation characteristics of the liquid antenna meet the preset radiation characteristics. If the processing device determines that the adjusted radiation characteristics of the liquid antenna does not conform to the preset radiation characteristics, the processing device may control the adjusting device to repeatedly perform the adjustment procedure until the adjusted radiation characteristics of the liquid antenna meet the preset radiation characteristics. Thereby, by automatically modifying the specification parameters of the liquid antenna and adjusting the body of the liquid antenna and its radiation specifications according to the specification parameters, the present invention can effectively achieve the purpose of designing, controlling or adjusting the liquid antenna and its radiation characteristics. efficacy.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

10, 20, 50, 60‧‧‧ liquid antenna

11‧‧‧Antenna housing

12‧‧‧Liquid conductor

13‧‧‧Feed in signal contacts

111‧‧‧Confined space

21, 51‧‧‧ substrate

22, 52, 62‧‧‧ ground plane

23, 53, 63‧‧‧ feed signal lines

231, 431, 531, 631‧‧‧ feed signal contacts

232, 532, 632‧‧‧ Grounding points

30‧‧‧Radiating characteristics control device for liquid antenna

31‧‧‧Adjustment device

32‧‧‧Processing device

54, 64‧‧‧ Short circuit point

701, 702, 703, 801, 802‧‧‧ curves

S902, S904‧‧‧ steps

FIG. 1A is a schematic diagram of a liquid antenna according to an embodiment of the invention.

FIG. 1B is a cross-sectional view of a liquid crystal according to an embodiment of the invention.

2 is a schematic diagram of a liquid antenna disposed on a substrate according to an embodiment of the invention.

FIG. 3 is a functional block diagram of a radiation characteristic control apparatus for a liquid antenna according to an embodiment of the invention.

4 is a schematic diagram of adjusting a feed signal contact of a liquid antenna according to an embodiment of the invention.

FIG. 5 is a schematic diagram of setting a short circuit point on a liquid antenna according to an embodiment of the invention.

FIG. 6 is a schematic diagram of setting a short circuit point on a liquid antenna according to another embodiment of the invention.

FIG. 7 is a graph showing return loss of a liquid antenna at different lengths according to an embodiment of the invention.

Figure 8 is a graph showing the return loss of a liquid antenna at different liquid conductor concentrations, in accordance with an embodiment of the present invention.

FIG. 9 is a flow chart of a method for controlling radiation characteristics of a liquid antenna according to an embodiment of the invention.

S902, S904‧‧‧ steps

Claims (10)

A radiation characteristic control method for a liquid antenna for controlling radiation characteristics of a liquid antenna, wherein the liquid antenna includes an antenna casing, a liquid conductor, and a feed signal contact, and the radiation characteristic control method of the liquid antenna includes: performing An adjustment procedure, wherein the adjusting procedure comprises: adjusting a specification parameter of the liquid antenna, and adjusting the liquid antenna according to the adjusted specification parameter; determining whether the adjusted radiation characteristic of the liquid antenna meets a predetermined radiation characteristic; And when the adjusted radiation characteristic of the liquid antenna does not conform to the preset radiation characteristic, the adjustment procedure is repeatedly performed. The method of claim 1, wherein the specification parameter comprises a length parameter, wherein the step of adjusting the specification parameter of the liquid antenna and adjusting the liquid antenna according to the adjusted parameter comprises: adjusting the length a parameter; and adjusting the length of the antenna housing according to the adjusted length parameter. The method of claim 1, wherein the specification parameter comprises a concentration parameter, wherein the step of adjusting the specification parameter of the liquid antenna and adjusting the liquid antenna according to the adjusted parameter comprises: adjusting the concentration a parameter; and adjusting the concentration of the liquid conductor according to the adjusted concentration parameter. The method of claim 1, wherein the specification parameter comprises a feed point setting parameter or a short circuit point setting parameter. The method of claim 1, wherein the radiation characteristic of the liquid antenna comprises one of a resonance frequency and an impedance matching or a combination thereof, wherein determining whether the adjusted radiation characteristic of the liquid antenna meets the pre-determination The step of setting the radiation characteristic comprises: determining whether the adjusted radiation characteristic of the liquid antenna meets the preset according to one of a return loss curve of the liquid antenna, an operating bandwidth and a radiation efficiency, or a combination thereof Radiation characteristics. A radiation characteristic control device for a liquid antenna, wherein the liquid antenna comprises an antenna casing, a liquid conductor and a feed signal contact, and the radiation characteristic control device of the liquid antenna comprises: an adjusting device for performing an adjustment procedure, In the adjusting procedure, the adjusting device adjusts a specification parameter of the liquid antenna, and adjusts the liquid antenna according to the adjusted parameter; and a processing device coupled to the adjusting device to determine the adjusted Whether the radiation characteristic of the liquid antenna conforms to a predetermined radiation characteristic, wherein when the adjusted radiation characteristic of the liquid antenna does not conform to the predetermined radiation characteristic, the processing device controls the adjusting device to repeatedly perform the adjustment procedure. The radiation characteristic control device for a liquid antenna according to claim 6, wherein the specification parameter comprises a length parameter. The radiation characteristic control device for a liquid antenna according to claim 6, wherein the specification parameter includes a concentration parameter. The radiation characteristic control device for a liquid antenna according to claim 6, wherein the specification parameter comprises a feed point setting parameter or a short circuit point setting parameter. The radiation characteristic control device for a liquid antenna according to claim 6, wherein the radiation characteristic comprises one of a resonance frequency and an impedance matching or a combination thereof.