Patent Application
20130207873
This application claims the priority benefit of Taiwan application serial no. 101104255, filed on Feb. 9, 2012. The entirety of the above-mentioned patent application is hereby incorporated by reference herein and made a part of this specification.
1. Field of the Invention
The invention is an improved method of loop antenna and the improved loop antenna thereof, and more particularly, to apply on the global positioning system.
2. Description of Related Art
While the functional requirements for smart phones are increasing, unfortunately with the current existing technology, the lack of space on the hardware frameworks is the most difficult challenge to overcome in the industry. The antenna structure for the Global Positioning System (GPS) requires a certain amount of configuration space, however, due to the volume of the smart phone design reduces as the antenna technology progresses, the configuration space would be compressed. Therefore, under the circumstance of limited space, the design for the GPS antenna structure would face the great challenge.
In general, if the configuration space is enough, the design for Patch Antenna would be the first choice. However, under the circumstance of limited space, the design for Solid Metal Structuring antenna or Laser Direct Structuring (LDS) antenna can be applied with various ways of structural design instead, even though in terms of costs will be more expensive. If the budget is relatively low, the design for Chip antenna can be chosen, but the drawbacks will be the poor efficiency and the requirement of larger space, as a result, such design is less likely to be applied on the small-size and portability of smart phones.
One aspect of the invention provides an improved method of loop antenna, by modifying a resonant wavelength of a basic loop antenna, in order for an antenna resonant frequency of a conformed specific communication system to be generated, the improved method of the loop antenna includes the following steps: connecting a first antenna radiator to a resonant point of the basic loop antenna electrically, and using an additional length the basic loop antenna from the connected first antenna radiator additional length to increase the resonant wavelength of the basic loop antenna, in order to generate the resonant frequency that conformed to the specific communication system.
Another aspect of the invention provides an improved loop antenna, comprising a basic loop antenna and a first antenna radiator. By modifying the antenna resonant wavelength of the basic loop antenna, an antenna resonant frequency that conformed to a specific communication system is generated. The first antenna radiator is connected to a resonant point of the basic loop antenna electrically. The first antenna radiator is used to increase the resonant wavelength of the basic loop antenna, in order to generate the resonant frequency of the conformed specific communication system.
In order to make the features and advantages of the invention more comprehensible, the invention is further described in detail in the following with reference to the embodiments and the accompanying drawings.
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
Reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the description to refer to the same or like parts.
In other words, the improved loop antenna 200 that is the resonant point 210 of the basic loop antenna 100 is connected to the first antenna radiator 220 electrically so as to the length of the overall antenna structure to be extended. As for the additional length over the basic loop antenna 100, the first antenna radiator 220 is then used to increase the resonant wavelength of the basic loop antenna 100. This also implies that the structure of the improved loop antenna 200 enables the resonant wavelength to extend. From a physical point of view, when the resonant wavelength is extended, the antenna resonant frequency is decreased correspondingly. In the specific communication system of the embodiment, the range of the antenna resonant frequency for the GPS is between 1.57 and 2.4 GHz.
In the aforementioned embodiments of the invention, both the first antenna radiator 220 and the second antenna radiator 410 can be fabricated of antenna shrapnel, a metal sheet, a flexible printed circuit board or a printed circuit board.
In other embodiments of the invention, the specific communication system is not just limited to the global positioning system. The specific communication system can also either be a wireless fidelity (WiFi) system or a third-generation (3G) wireless communication system. The improved method of loop antenna that provided by the invention, can base on the selected antenna resonant frequency of the specific communication system, to add either the first antenna radiator 220 or the second antenna radiator 410 on the basic loop antenna 100, in order for the original basic loop antenna 100 to obtain a longer resonant wavelength, and to generate a relatively low antenna resonant frequency.
In conclusion, the invention provides an improved method of loop antenna and the improved loop antenna thereof. According to the selected antenna resonant frequency of the specific communication system, the first antenna radiator or the second antenna radiator with the design of cavity structure can be applied on the basic loop antenna, and for the additional length over the basic loop antenna, an antenna radiator is used to increase the resonant wavelength of the basic loop antenna, in order to generate an antenna resonant frequency of the conformed specific communication system. Furthermore, the structural design of the first antenna radiator or the second antenna radiator of the invention is simple so that will not be accounted for the excess volume nor the extra increase for the space structural cost when the first antenna radiator or the second antenna radiator is configured inside the mobile communication equipment.
It will be apparent to those skilled in the art that various modifications and variations can be made to the structure of the invention without departing from the scope or spirit of the invention. In view of the foregoing, it is intended that the invention cover modifications and variations of this invention provided they fall within the scope of the following claims and their equivalents.
| Number | Date | Country | Kind |
|---|---|---|---|
| 101104255 | Feb 2012 | TW | national |
