Portable radio antenna

An antenna installed on a body housing of a portable radio apparatus, said antenna comprising:

• an antenna cap;
• rod antenna means for extending and retracting through said antenna cap;
• helical antenna means positioned within said antenna cap on a top surface of said body housing;
• feeding means positioned wholly within a recess formed in said top surface of said body housing and providing a direct electrical connection between said rod antenna means and a printed board and between said helical antenna means and said printed board, said feeding means being completely covered by said antenna cap to prevent said feeding means from being contacted from an exterior of said body housing;
• said rod antenna means comprising insulating means extending over a designated portion of a polyacetal rod, said polyacetal rod having an antenna inserting hole formed within an interior portion;
• said polyacetal rod extending through said antenna cap and a middle portion of said helical antenna means;
• and
• an antenna core wire having a bottom portion fixed to a stopper, said antenna core wire being positioned within said interior portion of said polyacetal rod.

A portable radio comprising:

• an antenna apparatus;
• transmitter and receiver means for transmitting and receiving a radio frequency signal to and from said antenna apparatus, respectively;
• connecting means having first and second conductive ends;
• duplexing means for coupling said transmitter and receiver means to the first end of said connecting means;
• housing means provided with a recess formed within a top surface, said housing means enclosing said transmitter and receiver means, said duplexing means and said connecting means;
• a conductive ring electrically connected directly to said second end of said connecting means for providing transmission of said radio frequency signal between said antenna apparatus and said transmitter and receiver means, said conductive ring being fully contained within said recess of said housing means and having a first fastening member formed on an inner periphery;
• housing connection means having a top surface with a cylindrical opening and a second fastening member formed on an outer periphery to engage said first fastening member, said housing connection means being positioned within said recess of said housing means with said top surface of said housing connection means substantially flush with said top surface of said housing means:
• said housing connection means being electrically connected directly to said conductive ring;
• and
• said antenna apparatus comprising:
• helical antenna means having a helical winding with first and second ends, said helical antenna means being positioned on said top surface of said housing connection means with said first end of said helical winding being electrically coupled to said housing connection means;
• and
• radiating means for extending from and retracting into said housing means said radiating means comprised of a polyacetal rod having a conductive wire positioned within an interior portion and insulating means positioned at a top portion for electrically insulating said radiating means from said helical antenna means when said radiating means is in a fully retracted position, said conductive wire being capacitively coupled to said helical antenna means when said radiating means is in a fully extended position, said antenna apparatus having radiating power centralized at a top portion when said radiating means is in said fully extended position.

An antenna configuration, comprising:

• housing means for encapsulating a printed board comprising a transmitter, receiver and duplexer, said housing means provided with a recess on a top surface;
• helical antenna means having an antenna cap positioned over said recess on said top surface of said housing means, said helical antenna means comprised of an electrically conductive helical winding disposed within said antenna cap;
• rod antenna means comprised of an antenna core wire and a polyacetal rod that extends from and retracts into said housing means, said polyacetal rod having an antenna insertion hole formed within an interior portion to accommodate said antenna core wire and insulating means positioned at a top portion for electrically insulating said rod antenna means from said helical antenna means when said polyacetal rod is in a fully retracted position, said antenna configuration having radiating power centralized at a top portion of said rod antenna means when said polyacetal rod is in a fully extended position;
• stopper means connected to a bottom portion of said polyacetal rod for preventing complete withdrawal of said rod antenna means from said housing means;
• a conductive ring electrically connected to said printed board for providing transmission of electrical signals between said helical and rod antenna means and said printed board, said conductive ring having a first fastening member formed on an inner periphery and being fully contained within said recess of said housing means;
• and
• housing connection means having a top surface with a cylindrical opening and a second fastening member formed on an outer periphery to engage said first fastening member, said housing connection means being positioned within said recess of said housing means with said top surface of said housing connection means substantially flush with said top surface or, said housing means, said housing connection means being electrically connected directly to said conductive ring.