Switched retractable, extendable, dual antennas for portable radio

Claim 2

Antenna equipment, comprising: a case containing a radio circuit; a first antenna element, connected to said radio circuit, which is movable between a stored position within said case and an extended position outside of said case; and means, connected to said first antenna element, for acting as a matching circuit element when said first antenna element is in said extended position and as a second antenna element when said first antenna element is in said stored position; said means being connected to a ground terminal when acting as said matching element, and being connected to an open terminal when acting as said second antenna element.

Claim 3

The antenna equipment of claim 1, wherein said acting means is provided outside of said case.

Claim 4

The antenna equipment of claim 2, wherein said acting means includes a first terminal which is coupled to one end of said first antenna element when said first antenna element is in said stored position, and which is coupled to a second end of said first antenna element when said first antenna element is in said extended position.

Claim 5

The antenna equipment of claim 3, wherein said acting means includes a second terminal, said equipment further comprising a switch which couples said second terminal to said ground terminal when said first antenna element is in said extended position and which couples said second terminal to said open circuit when said first antenna element is in said stored position.

Claim 6

The antenna equipment of claim 3, further comprising a stopper incorporating therein said first terminal, said stopper positioning said first antenna element with respect to said case and coupling said first terminal to one of said ends of said first antenna element.

Claim 7

The antenna equipment of claim 1, further comprising a signal line connected between said first antenna element and said radio circuit.

Claim 8

The antenna equipment of claim 6, wherein said signal line is selected from the group of a coaxial strip line, a coaxial line, a strip line, a triplet line, a Lecher line, and a coaxial line having a predefined shaped shield.

Claim 9

The antenna equipment of claim 4, wherein said acting means is selected from the group of a coil, a meander board, a chip, a line element, and a board element.

Claim 10

The antenna equipment of claim 4, further comprising a signal line having first and second ends, a hot conductor and a ground conductor, said signal line being connected at said first end thereof to said first antenna element and being connected at said second end thereof to said radio circuit; wherein said ground conductor is coupled at said first end to a ground of said radio circuit.

Claim 11

The antenna equipment of claim 9, wherein said second end of said signal line includes a λ/4 choke, λ being a wavelength of a signal on said signal line.

Claim 12

The antenna equipment of claim 4, further comprising an adjustment device, acting as a matching element, inserted between said second terminal and ground.

Claim 13

The antenna equipment of claim 11, wherein said adjustment device is selected from the group of an integrated circuit and a circuit board.

Claim 16

The communication method of claim 13, wherein said matching circuit providing step comprises the steps of connecting one end of said second antenna element to a first end of said first antenna element and connecting a second end of said second antenna element to said ground terminal.

Claim 17

The communication method of claim 14, wherein said antenna providing step comprises the steps of connecting said one end of said second antenna element to a second end of said first antenna element and connecting said second end of said second antenna element to said open terminal.

Claim 18

The communication method of claim 15, further comprising the step of providing a signal line for said second antenna element with said first antenna element.

Claim 19

The communication method of claim 16, wherein said second antenna element is selected from the group of a helical antenna and a reverse L antenna.

Claim 20

Antenna equipment, comprising: a case containing a radio circuit; a first antenna element, connected to said radio circuit, which is movable between a stored position within said case and an extended position outside of said case; means, connected to said first antenna element, for acting as a matching circuit element when said first antenna element is in said extended position and as a second antenna element when said first antenna element is in said stored position; and a signal line connected between said first antenna element and said radio circuit, wherein said acting means includes a first terminal which is coupled to one end of said first antenna element when said first antenna element is in said stored position, and which is coupled to a second end of said first antenna element when said first antenna element is in said extended position, and wherein said acting means includes a second terminal, said equipment further comprising a switch which couples said second terminal to a ground terminal when said first antenna element is in said extended position and which couples said second terminal to an open circuit when said first antenna element is in said stored position.

Claim 21

Antenna equipment, comprising: a case containing a radio circuit; a first antenna element, connected to said radio circuit, which is movable between a stored position within said case and an extended position outside of said case; means, connected to said first antenna element, for acting as a matching circuit element when said first antenna element is in said extended position and as a second antenna element when said first antenna element is in said stored position; and a signal line connected between said first antenna element and said radio circuit, wherein said acting means includes a first terminal which is coupled to one end of said first antenna element when said first antenna element is in said stored position, and which is coupled to a second end of said first antenna element when said first antenna element is in said extended position, and wherein said acting means includes a second terminal, said equipment further comprising a switch which couples said second terminal to a ground terminal when said first antenna element is in said extended position and which couples said second terminal to an open circuit when said first antenna element is in said stored position.

Claim 22

The antenna equipment of claim 18, wherein said acting means is provided outside of said case.

Claim 23

The antenna equipment of claim 18, further comprising a stopper incorporating therein said first terminal, said stopper positioning said first antenna element with respect to said case and coupling said first terminal to one of said ends of said first antenna element.

Claim 24

The antenna equipment of claim 18, wherein said signal line is selected from the group of a coaxial strip line, a coaxial line, a strip line, a triplet line, a Lecher line, and a coaxial line having a predefined shaped shield.

Claim 25

The antenna equipment of claim 18, wherein said acting means is selected from the group of a coil, a meander board, a chip, a line element, and a board element.

Claim 26

The antenna equipment of claim 18, further comprising a signal line having first and second ends, a hot conductor and a ground conductor, said signal line being connected at said first end thereof to said first antenna element and being connected at said second end thereof to said radio circuit; wherein said ground conductor is coupled at said first end to a ground of said radio circuit.

Claim 27

The antenna equipment of claim 23, wherein said second end of said signal line includes a λ/4 choke, λ being a wavelength of a signal on said signal line.

Claim 28

The antenna equipment of claim 18, further comprising an adjustment device, acting as a matching element, inserted between said second terminal and ground.

Claim 29

The antenna equipment of claim 25, wherein said adjustment device is selected from the group of an integrated circuit and a circuit board.

Claim 32

The communication method of claim 27, wherein said second antenna element is selected from the group of a helical antenna and a reverse L antenna.