Figure 8

is 8.5 by 8.5 in., including the printed microstrip transmission lines. Figure 8 illustrates a representative measured radiation pattern from this array. The measured array performances are summarized in Table 2. Clearly, the sequentially fed array gives better VSWR bandwidth, axial ratio, and side-lobe level (- 24 dB SLL) performance than the conventional feed array. Due to the smaller element spacing for the sequential feed array, the peak gain is slightly lower than the conventional feed array. Note that the antenna size may be further reduced to approximately 6 by 6 in. in size by replacing the feed lines with a PCB feed circuit board behind the radiating patch elements. CONCLUSiON Two different low-gain omni antennas (the drooping dipole and the TM2,-mode circular patch antennas), and two medium gain patch antennas were developed for the successful DBSR demonstrations in Pasadena, California and Buenos Aires, Argentina. These low-cost antennas can be used either in-doors or outdoors to receive digital audio signals from the TDRSS satellite. The patch antennas are more conformal than the drooping dipole antennas. For the medium gain antenna, the sequentially arranged CP fed array has a better CP per-formance over a broader bandwidth than the conventionally fed array. Finally, these antennas have myriad applications in modern satellite or wireless communication systems, suc