A note on the accuracy of the method of auxiliary sources in the far-field region

✍ Scribed by P. J. Papakanellos; I. I. Heretakis; C. N. Capsalis

• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 221 KB
• Volume: 46
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/mop.21053

✦ Synopsis

The radiation patterns at 5.25 GHz are for the notch frequency and the radiation patterns at 3.96 and 8.18 GHz are for the passband frequency. The measured radiation patterns at the passband frequency are about the same for both the antenna with U-slot and the antenna without U-slot. The measured results show that the radiation patterns in the y-z plane are conical, and the patterns in the x-z plane are nearly omnidirectional for all measured frequencies.

Figure 8 shows the measured peak gain of the proposed antenna with/without U-slot. The notches of 10 -12-dB magnitudes at 5.25 GHz have been created by inserting the U-slot. For the other frequencies outside the notch-frequency band, the antenna gain is about the same for both the antenna with U-slot and the antenna without U-slot.

4. CONCLUSION

A frequency-notched UWB planar monopole antenna with Lshape ground plane has been presented. The measured results show that a sharp frequency-band notch has been created very close to the center frequency of the 5-GHz WLAN frequency band by inserting the half-wavelength U-slot. REFERENCES 1. A. Kerkhoff and H. Ling, Design of a planar monopole antenna for use with ultra-wideband having a band-notched characteristic, IEEE Int