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Low‐cost antennas for direct broadcast satellite radio
Author(s) -
Wu T. K.,
Huang J.
Publication year - 1994
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.4650071005
Subject(s) - omnidirectional antenna , axial ratio , circular polarization , directional antenna , microstrip antenna , communications satellite , conformal antenna , dipole antenna , reflective array antenna , bandwidth (computing) , turnstile antenna , physics , microstrip , antenna (radio) , electrical engineering , satellite , optics , computer science , engineering , telecommunications , slot antenna , astronomy
Two omnidirectional and circularly polarized low‐gain antennas (the crossed drooping dipole and the TM 21 ‐mode circular patch antenna) are developed for direct broadcast satellite radio (DBSR) outdoor mobile terminal applications. Two medium‐gain circularly polarized microstrip patch arrays [one uses the conventional circular polarization (CP) feed and the other uses the sequentially arranged CP feed techniques] are also developed to provide at least 12–dBic peak gain for DBSR indoor fixed terminal applications. The sequentially arranged CP fed array has a better CP performance over a broader bandwidth than the conventionally fed array. All the antennas are small in size/mass and inexpensive in fabrication cost. The patch antennas also have a low profile. © 1994 John Wiley & Sons, Inc.