Abstract
A compact multiband antenna is designed using HFSS on FR4 substrate with permittivity of 4.4. The dimension of substrate is 50 × 75 × 1.6 mm3. An M-shaped antenna with symmetrical slots is proposed in this paper. Inset feeding is made to make it simple and compact. Multibands are obtained in S 11 versus frequency plots. Lower bands are obtained from 3.7–3.9 to 5.5–5.9 GHz. The higher bands are 9.3–10.3, 11.4–12.7, and 12.9–13.5 GHz. The higher bands are highly useful for X-band and Ku-band radar applications.
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