Portable communication unit and internal antenna used for same

Abstract

A rear case and a front case are unified to form a casing. An internal antenna is accommodated in a predetermined space in the rear case, and supported in a state that it is inserted between the rear case and a printed circuit board. An output end of an antenna metal element is connected with a feeding point of the internal antenna, and an input end thereof is connected with a feeding terminal of the printed circuit board via a contacting means. Accordingly, there is no necessity for soldering the antenna metal element to the feeding terminal of the printed circuit board, the number of structural elements can be reduced, and the fabricating process can be simplified.

What is claimed is:  
     
         1 . A portable communication unit comprising: 
 a printed circuit board on which a radio unit composed of a transmitter and a receiver is mounted,    an internal antenna which is classified into an inverted F shaped antenna or a dielectric antenna,    an antenna metal element which is connected with a feeding point of said internal antenna at an output end thereof, and brought into contact with a feeding terminal formed on said printed circuit board at an input end thereof,    a front case which is provided with a data-inputting key, an information-displaying means, a speaker, and a microphone, and    a rear case which is provided with a space for accommodating said internal antenna, and fitted to said front case to form a casing,    wherein said internal antenna is supported between said rear case and said printed circuit board.    
     
     
         2 . A portable communication unit according to  claim 1 , wherein: 
 said space in said rear cover for accommodating said internal antenna is a cavity which is fit for said internal antenna.    
     
     
         3 . A portable communication unit according to  claim 1 , wherein: 
 a conductive painting is applied to a predetermined region of an inner surface of said rear case, and brought into contact with a grounding pattern of said printed circuit board.    
     
     
         4 . A portable communication unit according to  claim 3 , wherein: 
 said conductive painting is applied to a region which is opposite said radio unit at least.    
     
     
         5 . A portable communication unit according to  claim 3 , wherein: 
 said internal antenna is composed of: 
 a radiator which is situated inside said rear case and connected with said metal element,  
 a reflecting plane which is situated opposite to said radiator maintaining a predetermined interval therebetween, and  
 connecting terminals which connect and edge of said reflecting plane with said conductive painting.  
   
     
     
         6 . An internal antenna of a portable communication unit which is accommodated in a casing composed of a front case and a rear case together with a printed circuit board, comprising: 
 a radiator situated inside said rear case,    an antenna metal element which is connected with said radiator at an output end thereof, and brought into contact with a feeding terminal formed on said printed circuit board at an input end thereof,    a reflecting plane which is situated opposited to said radiator maintaining a predetermined interval therebetween,    a conductive painting which is applied to an inner surface of said rear case and brought into contact with a grounding pattern of said printed circuit board, and    connecting terminals which connect an edge of said referencing plane with said conductive painting via contacting means.