Page 225 - Antennas for Base Stations in Wireless Communications
P. 225

198     Chapter Five

                                 E-plane   0°     H-plane
                              330°                     30°

                                             −10
                                           [dB]
                      300°                                     60°
                                             −20

                                             −30

                  270°                                            90°






                     240°                                      120°


                             210°                      150°

                                          180°
                          (a)  A four-element choke loaded patch array antenna
                                  E-plane   0°  H-plane

                              330°                     30°
                                            −10
                                           [dB]
                      300°                                     60°
                                            −20

                                            −30

                  270°                                            90°





                     240°                                      120°



                              210°                     150°
                                          180°

                         (b)  A sixteen-element choke loaded patch array antenna
                  Figure 5.24  Measured pattern of booster antennas
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