Page 100 - Integrated Wireless Propagation Models
P. 100

20
                                                                  2000
                                Urban area                      I   i O OO   c
                               Standard : hm  = 3  m )             700  ·c::;
                                            (
                                                                        Cii
                                                              /;1/      E
                             i 5                                   400  (/)
                                                             lj I I     E:
                                                                        ::::J
                                                            /;I    200  Q)
                                                                        i5
                                                           //, I II     ::2;
                                                           !/,
                          ill                                      i O O   N'
                          :s                                              I
                          c  i O                          //,  II  I II   �
                          "cti                           1///;  I
                          C>                                       i O O   .._  o
                          :c                             VII  I  I   I   c
                          C>                            / /, r; 1       ·c::;
                          "Qi                                      200
                          .<:                          1 # 1; II  I   ;  I  I   Q)
                           C<l                                  I  400 e>
                           c                           VII   / /        C<l
                           c   5                              I         _J
                          2                          ffi lj v,�   i O OO
                           c
                          <(                        ////; �  >
                                                   � r�
                                                 ,J  4"''
                                               /"
                              0
                                           /
                                   MHz
                               <200
                                       /  /
                                 \�  �
                                �  >400
                                           MHz
                                        2  3  7  i O
                                                      5
                                  Vehicular Station Antenna height hm ( m )
               FIGURE 2.12.1.3  Prediction curves for vehicular antenna height gai n   i n   an u r ban area.19
                         220        I    I
                         210  r---- Urban area
                                        m
                         200  r---- hb = 70
                                  hm =  i.5 m                             fc : M H z
                         i90  r----
                                                                       ,?-  -  1500
                         i B O                                              900
                                                              �  �  �
                       ill  i70                                             450
                       :s                                     �>  /   /
                       .3- i 6 0                       �      �·            150
                                                    !---""
                       (/)                       c..---..--- V/    . .  ;...  :...-..-
                       1l  i 5 0                 �  ·    v- ·  f.:":".-
                                         �  f-"""  �        /  �
                                            �
                       § i40                        1:":: ·
                                         .
                       'g      �  �  ......-;  v  0   �
                       g'  i30           . ·
                       0.   ��      �       _....-..- �c.-"
                       e 120
                       Q_                ... . .
                            �-      �
                         i i O
                             �
                         i O O
                          90
                          80
                          70
                          60
                            i  2 3  7  i O   20 30 40
                                                                        50
                                              5
                                                 Distance R  ( km )
               FIGURE 2.12.1.4  Propagation loss i n   an urban area with d i fferent fc.
          78
   95   96   97   98   99   100   101   102   103   104   105