Linear microstrip array antenna with a simple feed network

✍ Scribed by Choon Sae Lee; Tung-Hung Hsieh

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 108 KB
• Volume: 23
• Category: Article
• ISSN: 0895-2477
• DOI: 10.1002/(sici)1098-2760(19991005)23:1<25::aid-mop7>3.0.co;2-b

✦ Synopsis

Figure 10 Frequency drift as a function of the dc voltage applied to the active antenna oscillator. Voltage is varied from nominal V s 6 cc V to V s 4.5 V cc network, a standard MPIE technique using the multilayered media Green's functions is implemented.

Once the scattering matrices of both components are obtained, the loop gain is computed by evaluating the total scattering matrix of the open feedback loop network. A software code has been implemented to check the oscillation condition.

After the design process, an optimized structure has been manufactured and tested. Results show that the active antenna is correctly operating at the design frequency. Moreover, the oscillation obtained is very stable, and no spurious Ž . signals clean spectrum are obtained. Moreover, the far-field radiation shows clean, symmetric radiation patterns. Finally, the power level radiated is good, and the measured gain of the antenna is about 3.2 dBi, which represents a good compromise between quasiomnidirectional patterns and good radiation efficiency.