Invention content
In view of the above-mentioned problems, it is necessary to provide a kind of antenna structures of adjustable working frequency.
A kind of antenna structure comprising circuit board and the antenna element for being set to the circuit board, the circuit board are equipped with ground connectionFace, the antenna element include radiator, which is evenly spaced apart to enclose set on the periphery of the ground plane, and partial radiation body is successivelySeries connection forms antenna, and the working frequency of the antenna concatenated radiator number can be adjusted by changing.
Antenna structure of the present invention can adjust the length of antenna by changing the number of concatenated radiator, toDifferent working frequencies is obtained, to meet the different communication requirement of wireless communication device.
Specific implementation mode
Referring to Fig. 1, the antenna structure 100 of present pre-ferred embodiments can be used for wireless communication device such as mobile phone intoRow signal transmitting and receiving.The antenna structure 100 includes circuit board 10 and the antenna element 30 for being set to the circuit board 10.
The circuit board 10 is the mainboard of mobile phone, generally rectangular shaped.The circuit board 10 is equipped with the ground connection of rectangular areaFace 11.The ground plane 11 includes two long sides 111 and two short sides 113, and two long side 111 and the end of two short sides 113 are connected to formFour apex angles 115.
The antenna element 30 includes several radiators 31.Each radiator 31 is substantially in strip, and printing is formed in electricityOn road plate 10.The radiator 31 is evenly spaced apart to be arranged in the periphery of ground plane 11 successively.In the preferred embodiment, the radiationBody 31, which encloses, to be set to form rectangle frame, is specifically arranged in long side 111 respectively by 24 radiators 31 and 10 radiators 31 are distinguishedThe short side 113 for being arranged in ground plane 11 encloses and sets to be formed.
The radiator 31 enclose set shape also can with the shape of ground plane 11 change and be adjusted, to ground plane 11It is peripheral consistent.Wherein, partial radiation body 31 can connect to form antenna by inductance or Zero-ohm resistor with adjacent radiator 31,Such as antenna 50,60 shown in Fig. 2, and by change concatenated radiator 31 number, the formation antenna to adjustWorking frequency；Partial radiation body 31 can be grounded to form isolation part by Zero-ohm resistor, such as isolation part shown in Fig. 2 70,80。
Referring to Fig. 2, in the preferred embodiment, it should be positioned at 3 of the close long side 111 of two adjacent apex angles 1151 radiator 31 of radiator 31 and close short side 113, which is sequentially connected, is respectively formed antenna 50,60, which is respectivelyBT/WIFI antennas and GPS antenna.31 number of radiator that series connection forms antenna 50,60 can be increased or decreased to change its length,To obtain different working frequencies.
Radiator 31 between the antenna 50,60 is connected to ground plane 11 by the resistance of zero ohms and is grounded, shapeAt isolation part 70,80, prevent from generating interference between antenna 50,60.
Antenna structure 100 of the present invention can adjust antenna 50,60 by changing the number of concatenated radiator 31Length prevent not on the same day to obtain different working frequencies, and the isolation part 70,80 formed between different antennae 50,60Interference between line, it is ensured that antenna 50,60 performances stabilization.In addition, the printing of radiator 31 is formed in 10 surface of circuit board so that100 small volume of antenna structure.