Patent Publication Number: US-10784558-B2

Title: Small type high gain indoor Yagi antenna

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to Chinese patent application No. 201810655028.7 filed on Jun. 23, 2018, the contents of which are incorporated herein by reference in their entirety. 
     TECHNICAL FIELD 
     The present invention belongs to the field of communication technology, and specifically relates to a small type high gain indoor Yagi antenna suitable for indoor installation and use. 
     TECHNICAL BACKGROUND 
     Due to the large size of a traditional high-gain TV Yagi antenna, the installation thereof requires a specific antenna bracket and a specific embracing rod, meanwhile, due to the directional characteristic of the Yagi antenna, it is extremely inconvenient to adjust the orientation and the angle of the antenna after installation. In addition, due to the size and shape thereof, a user can only choose to mount the antenna in an outdoor location such as a top floor of a building, an outdoor environment and various weather factors cause the use time and service life of the Yagi antenna to be greatly reduced. 
     SUMMARY 
     In order to overcome the problem in the prior art and provide a TV antenna solution suitable for indoor installation and use, the present invention proposes a small type high gain indoor Yagi antenna, and is specifically realized by the following technical means: the small type high gain indoor Yagi antenna includes an antenna body, a PCB substrate and an antenna bracket. where the antenna body includes an upper shell and a lower shell which are fastened to each other, the upper shell and the lower shell are sealed together to form an inner cavity containing the PCB substrate, the PCB substrate is in a long-strip shape and includes a PCB Barron and a high gain amplifier, one end of the PCB substrate is connected to a signal director, and the other end thereof is connected to a signal reflector, a middle section thereof is connected to a main antenna oscillator, the portions of the signal director, the signal reflector and the main antenna oscillator, which are electrically contacted with the PCB substrate respectively, are wrapped by the upper shell and the lower shell, the bottom surface of the lower shell is provided with a feed line terminal block, the feed line terminal block is connected to the PCB substrate; the antenna bracket includes a bracket rod that can be flexibly bent, the top end of the bracket rod is provided with a universal adjusting mechanism connected to the lower shell, and the orientation of the antenna body is adjusted by the bracket rod and the universal adjusting mechanism, the bottom end of the bracket rod is provided with a bracket base standing on an attachment surface. 
     Compared with the prior art, the present invention has the following advantages: by reducing the number and size of the oscillators and by cooperating with the high-efficiency PCB Barron and the high gain amplifier, the performance of the antenna can reach the standard, therefore, the present invention can meet a user&#39;s requirements only by being mounted indoors, the upper shell and the lower shell of the antenna are used to seal the PCB substrate, which not only protects the high gain amplifier and other inner elements, but also facilitates the present invention more beautiful than the traditional Yagi antenna, the present invention is fixed and used by cooperating the antenna body with a detachable and adjustable bracket of the suction disk, the suction disk of the bracket discharges air by pressing downwards the lock catch, a vacuum state between the suction disk and a mounting plane facilitates the suction disk to be adsorbed on the mounting plane, the inner portion of the bracket rod of the antenna is supported by soft aluminum, when a certain force is applied to the soft aluminum, the angle thereof can be arbitrarily changed so that the antenna can be mounted at any angle, in addition, the orientation of the antenna is adjusted to loosen or tighten the adjusting nut so that the antenna can be fixed and used after turning at any angle within 360 degrees, thereby solving the use problem of the directional characteristic of the Yagi antenna. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective structural view of a small type high gain indoor Yagi antenna of the present invention. 
         FIG. 2  is a side structural view of a small type high gain indoor Yagi antenna of the present invention. 
         FIG. 3  is a top structural view of a small type high gain indoor Yagi antenna of the present invention (an upper shell is omitted). 
     
    
    
     DETAILED DESCRIPTION 
     The solution of the present application is further described below in conjunction with  FIGS. 1 to 3 : 
     A small type high gain indoor Yagi antenna includes an antenna body  1 , a PCB substrate  2  and an antenna bracket  3 , the antenna body  1  includes an upper shell  11  and a lower shell  12  which are fastened to each other, the upper shell  11  and the lower shell  12  are sealed together to form an inner cavity containing the PCB substrate  2 , the PCB substrate  2  is in a long-strip shape and includes a PCB Barron  21  and a high gain amplifier  22 , one end of the PCB substrate  2  is connected to a signal director  13 , and the other end thereof is connected to a signal reflector  14 , a middle section thereof is connected to a main antenna oscillator  15 , the signal director  13 , the signal reflector  14  and the main antenna oscillator  15  are extended from the upper shell and lower shell, the portions of the signal director  13 , the signal reflector  14  and the main antenna oscillator  15 , which are electrically contacted with the PCB substrate  2 , are wrapped by the upper shell  11  and the lower shell  12 , the bottom surface of the lower shell  12  is provided with a feed line terminal block  16 , the feed line terminal block  16  is connected to the PCB substrate  2 ; the antenna bracket  3  includes a bracket rod  31  that can be flexibly bent, the top end of the bracket rod  31  is provided with a universal adjusting mechanism  32  connected to the lower shell  12 , the orientation of the antenna body  1  is adjusted by the bracket rod  31  and the universal adjusting mechanism  32 , the bottom end of the bracket rod  31  is provided with a bracket base  33  standing on an attachment surface. Specifically, the bracket base  33  includes a suction disk  332  with a lock catch  331 , the bracket rod  31  is a metal setting tube, the universal adjusting mechanism  32  includes a universal ball  32   a , a universal ball tray  32   b , an adjusting screw  32   c  and an adjusting nut  32   d , the universal ball  32   a  is mounted in an inner cavity of the universal ball tray  32   b , the inner cavity of the universal ball tray  32   b  has a concave spherical surface cooperated with the universal ball  32   a , the universal ball  32   a  and the concave spherical surface are rotatably cooperated, the universal ball tray  32   b  is connected to the end of the bracket rod  31  via a plurality of curved arms  34 , and the adjusting nut  32   d  is placed therebetween, the suction disk  332  discharges air by pressing downwards the lock catch  331 , a vacuum state between the suction disk  332  and a mounting plane (an attachment surface) facilitates the suction disk to be adsorbed on the mounting plane, the inner portion of the bracket rod of the antenna is supported by soft aluminum, when a certain force is applied to the soft aluminum, the angle thereof can be arbitrarily changed so that the antenna can be mounted at any angle, in addition, the orientation of the antenna is adjusted to loosen or tighten the adjusting nut so that the antenna can be fixed and used after turning at any angle within 360 degrees, thereby solving the use problem of the directional characteristic of the Yagi antenna; the PCB Barron  21  is arranged between the main antenna oscillator  15  and the signal director  13 , the high gain amplifier  22  is arranged between the main antenna oscillator  15  and the signal reflector  14 , by reducing the size of the signal director  13 , the signal reflector  14  and the main antenna oscillator  15  (for example, the length of the signal director  13  is 174 mm, the length of the signal reflector  14  is 224 mm and the length of the main antenna oscillator  15  is 165 mm), and by cooperating with the high efficiency PCB Barron  21  and the high gain amplifier  22 , the performance of the antenna reaches the standard, thereby meeting the requirements of signal reception and indoor installation, 
     The above-mentioned preferred embodiments are to be considered as illustrative of the embodiments of the present application. Any identity and similarity with the present application or technical derivations, substitutions, improvements, etc., which are made based on the same, should be regarded as the protection scope of the present patent.