equivalent material one end of the coil 107 is connected to a conductive sleeve 108 which is fastened in one end of the insulating sleeve 106 the conductive sleeve 108 is effective in connecting the coil 107 electrically to portable equipment for instance a hand carried telephone not shown and forms the means for attaching the antenna means externally to the portable equipment secondly a second helical antenna which is comprised of a second coil 103 whose length is different to and preferably shorter than the length of the first coil 107 and thirdly a straight wire antenna 105 the second coil 103 is arranged coaxially in an insulated upper part 104 of an antenna rod or pin 102 which is provided with a knob 101 on top of the pin the lower part of the antenna pin includes the straight wire antenna 105 and the whole of the antenna pin 102 can be inserted and extended axially through the insulating sleeve 106 the first coil 107 and the conductive sleeve 108 attached to the other end of the insulating sleeve 106 is an insulating tube 109 which when fitted in place is located within the portable equipment and in which the antenna pin 102 is located in when in its inserted or retracted position axial movement of the antenna pin is preferably limited by the knob 101 and also by a shoulder or abutment not shown on the lower end of the antenna pin 102 when the antenna pin 102 is telescoped to its inwardly inserted position the straight wire antenna will lie generally beneath the conductive sleeve 108 and is essentially inactive the two coils 107 103 are located coaxially with one another in generally the same axial position the coils are.