17162980 A description referring to fig1 it will be understood that advantageously receiver 10 of the system may be located in high rise structure 12 to best serve community communication requirements relatively low power portable transmitter 14 is likely to be located in building or structure 16 radiation path 18 for portable transmitter 14 is through and out of structure 16 thereby causing a random polarization of the signal therefrom shown schematically 20 random polarization 20 is due to the multiple reflections of the energy which are to be expected under the stated condition i e transmission from within a building or structure to a receiver outside of the structure on the other hand mobile unit 22 may utilize a vertical whip antenna which is known to be vertically polarized 26 since mobile unit 22 is not within a structure such as building 16 line of transmission 24 is more likely to be on a clear or line of sight path to receiver antenna 28 since transmission path 24 is not as likely to include reflective surfaces the signal is more likely to retain its vertically polarized character all the way to receiving antenna 28 and of course it will be recognized that if signal path 24 from relatively high powered mobile transmitter unit 22 does encounter a reflective surface in its path to receiving antenna 28 it is likely that it will be.