CST – Computer Simulation Technology

Microstrip-fed Linear Tapered Slot Antenna

Image of the Microstrip-fed Linear tapered slot antenna Image of the Microstrip-fed Linear tapered slot antenna

The Linear Tapered Slot Antenna (LTSA) forms part of a group of antennas called end-fire tapered slot antennas (TSAs). End-fire tapered slot antennas include the constant width (CWSA), linearly tapered (LTSA) and the exponentially tapered (ETSA), also known as a Vivaldi antenna. Performance characteristics of TSAs include: Wideband, medium gain and low sidelobes.

The microstrip-fed LTSA uses a microstrip to slotline feed, commonly used when the antenna is manufactured on a dielectric substrate. A microstrip to slotline transition is realised by etching the slotline on one side of the substrate, which is crossed at a right angle by a microstrip line on the opposite side of the substrate. The microstrip line is flared to form a radial stub which acts as a wideband, virtual short circuit at the microstrip-slotline intersection. The slotline is extended into a circular cavity to act as a wideband, virtual open circuit. The advantage of this feed method is that both the antenna and its feed (which may also include an impedance matching section) can be etched onto a single substrate....

Typical total 3D radiation pattern at the center frequency Typical total 3D radiation pattern at the center frequency Typical S11 performance of the antenna Typical S11 performance of the antenna

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