Resonant oscillations of diffraction structures with weak nonlinearity

✍ Scribed by Fridrikh G. Bass; Anatoly Ya. Slepyan; Gregory Ya. Slepyan

• Publisher: John Wiley and Sons
• Year: 1998
• Tongue: English
• Weight: 139 KB
• Volume: 19
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19981020)19:3<203::aid-mop9>3.0.co;2-p

✦ Synopsis

Evaluation of the x-and z-directed currents for the EH n mode will reveal the mode order of this mode. These currents are given in Figure 6, and are typical of the x-and z-directed currents found on an open microstrip for an EH leaky mode 1 Ž w x. compare 9 . Therefore, EH appears to be another mode n with a similar current distribution to the EH mode, which is 1 excited by the introduction of an air gap.

For the data presented, the operating point at which the coupling occurs is at a much lower frequency than what the antenna would normally operate at in order to radiate effectively into the half space; therefore, the coupling will not affect the operational bandwidth of the antenna.

CONCLUSION

Ž

. Air gaps greater than 4 mm f 5d provide little change to the performance of a microstrip leaky-wave antenna with the structural parameters given in Figure 1.

An air gap situated between a microstrip leaky-wave antenna and a half space can provide coupling between the first higher mode and a new mode. This coupling occurs as the air gap thickness is changed.