The Antipodal Vivaldi antenna is proposed to solve the regole carte da gioco pokemon feeding in coplanar ones.
Results are confirmed with measurements.
The antenna is based on a combination of two crossed exponentially tapered slots plus a star-shaped slot to produce a completely symmetric balanced structure.
The the printed boards with the antenna groups can also be nested crosswise for a second plane of polarization.In this type of Vivaldi antenna one of the layers is printed on top and the other one which is tapered in opposite direction is printed on the bottom of the dielectric substrate material.The feeding of the antenna is on the narrow side slot.The beam direction of the antenna is the direction in which the conical australia giocho tipico di carte memori slot expands.Due to the large bandwidth, this antenna shape is suitable for ultra-wideband applications.This antenna can be fed easily by soldering the connector to the two sides of the PCB material.Its properties, such as the thickness of the carrier material and its dielectric constant have an influence on the properties of the antenna.Gibson under the name The Vivaldi Aerial.The antenna can be fed by aperture coupling from the other side as depicted in the Figure.Figures of merit like output pulse fidelity and time window containing 90 of the transmitted energy are analyzed and showed to comply with UWB application requirements.This antenna was presented at the 9th European Microwave Conference (EuMic) in 1979.The Vivaldi antenna can be made of thin copper sheets or simple double-laminated printed circuit board material.Source: 3rd European Conference on Antennas and Propagation, 2009.The opposite side to the beam direction is short-circuited by a /4-stub.Figure 1: Design of the (coplanar) Vivaldi antenna (The PCB material is shown transparently here.) external ground (top layer) supportive substrates central conductor (middle layer) external ground (bottom layer figure 2: Exploded view drawing of a balanced antipodal Vivaldi antenna external ground (top layer) supportive.
Tapered Slot Antenna (Vivaldi- Antenna the Tapered Slot Antenna (TSA) (also called: Vivaldi antenna) is an extremely broadband slot antenna (over several octaves wherein the slot is widened conically.A couple of antennas can be made on the same circuit board next to each other as a group antenna.An dielectric layer has been added on top of the antipodal structure and an additional metal plate just like the one in the bottom of the antenna has been printed on top of the newly added layer.The polarization of a single radiator is linear.The electric field lines are parallel to the printed circuit board material.Vol./Issue/Date: 23-, year: 2009, page(s, abstract: This paper presents a compact and low-profile printed antenna that exhibits adequate performance for UWB communications.
To increase the bandwidth of the antenna, this stub may be designed to be circular with a diameter of one-quarter wavelength of the center frequency.