CST – Computer Simulation Technology

Planar Monopole with Parasitic Inverted-L Element

Image of the Planar monopole with parasitic inverted-L element Image of the Planar monopole with parasitic inverted-L element

The planar monopole with parasitic inverted L antenna is ideal for integration in WLAN applications. It operates in 3 WLAN bands and it is compact with low manufacturing costs.

The operation of this antenna can be understood by considering a printed L-monopole. The addition of a second parasitic L-strip (which is electromagnetically coupled to the driven L and supports an additional resonance) provides multiband performance. When correctly designed, the parasitic L-element is smaller than an L-monopole that would typically be required to support the lower resonance, resulting in a reasonably compact topology. The following graph shows the antenna's |S11| performance across the desired WLAN bands.

|S11| performance over 3 WLAN bands |S11| performance over 3 WLAN bands

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