What is the difference between a ½-wave and a ¼-wave antenna?
| Antenna Type |
½-wave |
¼-wave |
| Alternate name |
Dipole |
Monopole |
| # of elements |
2 |
1 |
| Requires ground plane? |
No |
Yes |
| Gain (dBi) |
2.1 |
1.9 |
| |
¼ wavelength |
| Frequency |
Inches |
Centimeters |
| 915 MHz |
3.1 |
8 |
| 2.4 GHz |
1.17 |
3 |
For RF applications, 1/2 wave antenna will be more suitable compared to 1/2 wave antenna due to following reasons:
- No Ground plane is required for 1/2 wave antenna while its required for 1/4 wave antenna.
- More energy will be transmitted horizontally in 1/2 wave antenna compared to 1/4 wave antenna.
- Half wave antenna will be taller is size and would therefore be able to avoid more obstacles than quarter wave antenna.
Last updated:
Jan 01, 2024