@article{1433113,
      recid = {1433113},
      author = {Geng, Junping,},
      title = {Omnidirectional slots antenna /},
      pages = {1 online resource (xxv, 170 pages) :},
      abstract = {Omnidirectional antenna with high gain, low profile,  vertical polarization, even CP polarization is very  difficult to design, although it is from the dipole. In  this book, a novel idea that the running wave in the  coaxial wire is disturbed by the orthogonal slot array on  the cylindrical metal shell is introduced, which radiates  the CP wave in omni-direction. When feeding on two ends of  the coaxial wire respectively, there will appear left hand  circularly polarized (LHCP) omnidirectional radiation or  right hand circularly polarized (RHCP) omnidirectional  radiation. By introducing the T-shaped feed structure, the  coaxial wire with slot array can conveniently produce the  LHCP and RHCP radiation diversity with one end feeding. In  the further, combining with the directional antenna, it  will generate the pattern diversity in the half-sphere  space. The antenna of the coaxial wire with slot array can  further transform into conical CP beam antenna if the  coaxial wire becomes into a conical frustum. By introducing  the PIN diode into the slot, the antenna of the coaxial  wire with slot array can radiate the reconfigurable  directional beam by switching the states of the PIN diodes.  By introducing a novel switchable microwave circuit, the  omnidirectional /directional pattern switchable antenna can  be realized easily. This book proposes a continues method  to develop the potentialities of the omnidirectional  antenna. And the readers can study the method or ideas of  the omnidirectional antenna, even graft the CP or diversity  methods to other antennae.},
      url = {http://library.usi.edu/record/1433113},
      doi = {https://doi.org/10.1007/978-981-15-9089-4},
}