Patent ID: 6031493
Filing Date: 2000-02-29
Classification: H01Q

Abstract:
An antenna unit having a fixed antenna unit and a slide antenna unit freely contained in said fixed antenna unit, whereinsaid fixed antenna unit includes a helical antenna; andsaid slide antenna unit includes:a first monopole antenna provided on a same axis as said helical antenna;a second monopole antenna; andan antenna cover for holding said second monopole antenna on an extended axis of said first monopole antenna; and whereinsaid first monopole antenna is held at a position where said first monopole antenna is not electromagnetically connected to said helical antenna when said slide antenna unit is pulled out of said fixed antenna unit, and said second monopole antenna is held at a position where said second monopole antenna is electromagnetically connected to said helical antenna when said slide antenna unit is pulled out of said fixed antenna unit;said first monopole antenna is held at a position where said first monopole antenna is electromagnetically connected to said helical antenna when said slide antenna unit is contained in said fixed antenna unit, and said second monopole antenna is held at a position where said second monopole antenna is not electromagnetically connected to said helical antenna when said slide antenna unit is contained in said fixed antenna unit; andelectric power is supplied to said first monopole antenna and said second monopole antenna via said helical antenna.