A mobile radio machine of folding type with simple structure which can receive a pull-out type whip antenna and function as antenna even when the antenna is restored is disclosed.In the mobile radio machine, when the antenna is pulled out, a change-over circuit 8 connects a radio circuit 12 with an
A mobile radio machine of folding type with simple structure which can receive a pull-out type whip antenna and function as antenna even when the antenna is restored is disclosed.In the mobile radio machine, when the antenna is pulled out, a change-over circuit 8 connects a radio circuit 12 with an impedance matching circuit 9 and supplies power to a linear antenna element 1 through a feeding terminal 5 , so that only the linear antenna element 1 functions as antenna. When the antenna is restored, the change-over circuit 8 connects the radio circuit 12 with an impedance matching circuit 10 and supplies power to a coil antenna element 3 through a feeding terminal 6 , and therefore only the coil antenna element 3 functions as antenna. Thus, antenna can be used in a small size, folding type mobile radio machine in simple structure.
대표청구항▼
1. A mobile radio machine, comprising:an antenna including a linear antenna element which is a lower portion of the antenna, and a coil antenna element which is an upper portion of the antenna, said linear and coil antenna elements being separated and electrically isolated from one another by an ins
1. A mobile radio machine, comprising:an antenna including a linear antenna element which is a lower portion of the antenna, and a coil antenna element which is an upper portion of the antenna, said linear and coil antenna elements being separated and electrically isolated from one another by an insulating member, and said antenna being rotated on a lowest position thereof to take a standing-up position so that said linear and coil antenna elements are exposed to outside of a main body, and to take a laying-down-position so that said coil antenna element is only exposed to outside of said main body, while said linear antenna element is restored in said main body;a first feeding terminal for making a contact with said linear antenna element when said antenna is in said standing-up position;a second feeding terminal for making a contact with said coil antenna element when said antenna is in said laying-down position;a first impedance matching circuit connected via said first feeding terminal to said linear antenna element;a second impedance matching circuit connected via said second feeding terminal to said coil antenna element; anda switching circuit for connecting said first impedance matching circuit to a radio circuit, when said antenna takes said standing-up position, and connecting said second impedance matching circuit to said radio circuit, when said antenna takes said laying-down position. 2. A mobile radio machine, according to claim 1, further comprising a switch, wherein:said switch is of such structure that, when said antenna is restored, said switch becomes on by pressure pushed by a part of said antenna against its actuator, and when said antenna stands uprightly, said switch becomes off by release of said pushing pressure against said actuator. 3. A mobile radio machine, according to claim 1, further comprising a rotation shaft, wherein: said main body of radio machine is that of a folding type radio machine, and said rotation shaft rotates so that said antenna is restored, in a direction parallel to the direction of a folding axis of said radio machine. 4. A mobile radio machine with a lay-able type antenna enabled to stand uprightly and be restored in a main body of said radio machine around a rotating shaft provided on a part of said main body, said radio machine comprising:an antenna which is said lay-able type antenna comprising a first conductive feeding terminal provided with said rotating shaft at an end of the first conductive feeding terminal, a linear antenna element connected at one end of said linear antenna element with said first conductive feeding terminal, an insulating member connected at one end of said insulating member with the other end of said linear antenna element, a conductive contact terminal having one end of the conductive contact terminal connected with the other end of said insulating member, and a coil antenna element electrically connected with the other end of said contact terminal, wherein a center axis of the coil antenna element is located on the extended line of a center axis of said linear antenna element, and the insulating member separates and electrically isolates the linear antenna element from coil antenna element;a switch for detecting whether said antenna is in an uprightly standing state or in a restored state;a second conductive feeding terminal allocated at a position in said main body such that the second conductive feeding terminal contacts said contact terminal when said antenna is restored;a first impedance matching circuit connecting with said first feeding terminal;a second impedance matching circuit connecting with said second feeding terminal;a radio circuit for conducting radio communication; anda change-over circuit for connecting selectively, when said switch detects that said antenna is in said uprightly standing state, said radio circuit with said first impedance matching circuit to allow said radio circuit to supply power to said first feeding termin al via said first impedance matching circuit, and for connecting selectively, when said switch detects that said antenna is in said restored state, said radio circuit with said second impedance matching circuit to allow said radio circuit to supply power to said second feeding terminal via said second impedance matching circuit. 5. A mobile radio machine, according to claim 4, wherein:said switch is of such structure that, when said antenna is restored, said switch becomes on by pressure pushed by a part of said antenna against its actuator, and when said antenna stands uprightly, said switch becomes off by release of said pushing pressure against said actuator. 6. A mobile radio machine, according to claim 4, wherein:said main body of radio machine is that of a folding type radio machine, and said rotating shaft rotates so that said antenna is restored in a direction parallel to the direction of a folding axis of said radio machine. 7. A mobile radio machine with a lay-able type antenna enabled to stand uprightly and be put in a main body of said radio machine around a rotating shaft provided on a part of said main body, said radio machine comprising:an antenna which is said lay-able type antenna comprising a first conductive feeding terminal provided with said rotating shaft at an end of the first conductive feeding terminal, a linear antenna element connected at one end of said linear antenna element with said first conductive feeding terminal, an insulating member connected atone end of said insulating member with the other end of said linear antenna element, a conductive contact terminal having one end of the conductive contact terminal connected with the other end of said insulating member, and a meander-line-like inductance element electrically connected with the other end of said contact terminal, wherein a center axis of said meander-line-like inductance element is located on the extended line of center axis of said linear antenna element, and the insulating member separates and electrically isolates the linear antenna element from the meander-line-like inductance element;a switch for detecting whether said antenna is in an uprightly standing state or bin a restored state;a second conductive feeding terminal allocated at a position in said main body such that the second conductive feeding terminal contacts said contact terminal when said antenna is restored;a first impedance matching circuit connecting with said first feeding terminal;a second impedance matching circuit connecting with said second feeding terminal;a radio circuit for conducting radio communication; anda change-over circuit for connecting selectively, when said switch detects that said antenna is in said uprightly standing, said radio circuit with said first impedance matching circuit to allow said radio circuit to supply power to said first feeding terminal via said first impedance matching circuit, and for connecting selectively, when said switch detects that said antenna is in said restored state, said radio circuit with said second impedance matching circuit to allow said radio circuit to supply power to said second feeding terminal via said second impedance matching circuit. 8. A mobile radio machine, according to claim 7, wherein:said switch is of such structure that, when said antenna is restored, said switch becomes on by pressure pushed by a part of said antenna against its actuator, and when said antenna stands uprightly, said switch becomes off by release of said pushing pressure against said actuator. 9. A mobile radio machine, according to claim 7, wherein:said main body of radio machine is that of a folding type radio machine, and said rotating shaft rotates, when said antenna is restored in a direction parallel to the direction of a folding axis of said radio machine. 10. A mobile radio machine with a lay-able type antenna enabled to stand uprightly and be restored in a main body of said radio machine around a rotating shaft provided on a part of said main body, said radio machine comprising:an antenna which is said lay-able type antenna comprising a first conductive feeding terminal provided with said rotating shaft at an end of said first conductive feeding terminal, a linear antenna element connected at one end of said linear antenna element with said first conductive feeding terminal, an insulating member connected at one end of the insulating member with an other end of said linear antenna element, a conductive contact terminal having one end of the conductive contact terminal connected with the other end of said insulating member, and a coil antenna element electrically connected with the other end of said contact terminal, wherein a center axis of said coil antenna element is located on the extended line of center axis of said linear antenna element, and the insulating member separates and electrically isolates the linear antenna element from the coil antenna element;a second conductive feeding terminal allocated at a position in said main body such that the second conductive feeding terminal contacts said contact terminal when said antenna is restored;a first impedance matching circuit connected with at least said first feeding terminal;a second impedance matching circuit connected with at least said second feeding terminal;a radio circuit for making radio communication; anda switch for connecting selectively, when said antenna is detected in an uprightly standing state, said radio circuit with said first impedance matching circuit to allow power to be supplied via said first impedance matching circuit to said first feeding terminal, and for connecting selectively, when said antenna is detected in a restored state, said radio circuit with said second impedance matching circuit to allow power to be supplied via said second impedance matching circuit to said second feeding terminal. 11. A mobile radio machine, according to claim 10, wherein:said switch is of such structure that, when said antenna is restored, said switch becomes on by pressure pushed by a part of said antenna against its actuator, and when said antenna stands uprightly, said switch becomes off by release of said pushing pressure against said actuator. 12. A mobile radio machine, according to claim 10, wherein:said main body of radio machine is that of a folding type radio machine, and said rotating shaft rotates so that said antenna is restored in a direction parallel to the direction of a folding axis of said radio machine. 13. A mobile radio machine with a lay-able type antenna enabled to stand uprightly and be restored in a main body of said radio machine around a rotating shaft provided on a part of said main body, said radio machine comprising:an antenna which is said lay-able type antenna comprising a first conductive feeding terminal provided with said rotating shaft at an end of said first conductive feeding terminal, a linear antenna element connected at one end of the linear antenna element with said first conductive feeding terminal, an insulating member connected at one end of said insulating member with the other end of said linear antenna element, a conductive contact terminal having one end of the conductive contact terminal connected with one end of said insulating member, and a meander-line-like inductance element electrically connected with the other end of said contact terminal, wherein a center axis of the meander-line-like inductance element is located on the extended line of center axis of said linear antenna element, and the insulating member separates and electrically insolates the linear antenna element from the meander-line-like inductance element;a second conductive feeding terminal allocated at a position in said main body such that the second conductive feeding terminal contact said contact terminal when said antenna is restored;a first impedance matching circuit connected with at least said first feeding terminal;a second impedance matching circuit connecte d with at least said second feeding terminal;a radio circuit for making radio communication; anda switch for connecting selectively, when said antenna is detected in an uprightly standing state, said radio circuit with said first impedance matching circuit to allow power to be supplied via said first impedance matching circuit to said first feeding terminal, and for connecting selectively, when said antenna is detected in a restored state, said radio circuit with said second impedance matching circuit to allow power to be supplied via said second impedance matching circuit to said second feeding terminal. 14. A mobile radio machine, according to claim 13, wherein:said switch is of such structure that, when said antenna is restored, said switch becomes on by pressure pushed by a part of said antenna against its actuator, and when said antenna stands uprightly, said switch becomes off by release of said pushing pressure against said actuator. 15. A mobile radio machine, according to claim 13, wherein:said main body of radio machine is that of a folding type radio machine, and said rotating shaft rotates so that said antenna is restored in a direction parallel to the direction of a folding axis of said radio machine.
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이 특허에 인용된 특허 (7)
Zhou, Guangping; Kuksuk, Michael J.; Kenoun, Robert; Azam, Zafarul, Antenna adapted to operate in a plurality of frequency bands.
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