Abstract
Circularly polarized diagonally symmetric slotted microstrip-patch antennas are proposed with compact size. The compact circularly polarized (CP) diagonally symmetric slotted microstrip-patch (DSSMP) antenna design rules are also summarized. Circularly polarized radiation can be achieved using any arbitrarily shaped slots in diagonal directions on the square microstrip-patch antenna. Different shapes for the slots are studied and compared, based on the fixed overall volume of the antenna for circularly polarized diagonally symmetric slotted microstrip-patch antennas. The crossshaped-slot diagonally symmetric slotted microstrip-patch antenna is compact when compared with the circular-, square-, and circular-ring-shaped diagonally symmetric slotted microstrip-patch antennas. A measured 3 dB axial-ratio (AR) bandwidth of around 0.7% (6.0 MHz) with 2.0% (18.0 MHz) impedance bandwidth was achieved. The measured boresight gain was more than 3.3 dBic over the operating band, while the overall antenna size was 0.272λ0×0. 272λ0×0.0138λ0 at 0.905 GHz.
| Original language | English |
|---|---|
| Article number | 6529322 |
| Pages (from-to) | 124-137 |
| Number of pages | 14 |
| Journal | IEEE Antennas and Propagation Magazine |
| Volume | 55 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Apr 2013 |
| Externally published | Yes |
Keywords
- Circularly polarized antennas
- Compact antennas
- Microstrip antenna
- Slots
- Slotted microstrip antennas
- Square patch