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The dual band MIMO antenna composed of inverted L antenna is proposed and numerically analyzed. The design frequency is 2.4 GHz to 2.5 GHz, 5.15 GHz to 5.35 GHz. Inverted L antenna is formed by the coplanar waveguide. The parasitic planar rectangular loop is placed above the of inverted L antenna. When the size of conducting plane is 51 mm by 48 mm, the S11 less than −10 dB is satisfied from 2.4 GHz...
The two elements array antenna composed of inverted L antennas printed on the two-layer dielectric substrate and excited by the microstrip line through the slot is proposed and numerically analyzed. The size of the antenna is 0.24 λ by 1.25 λ by 0.0352 λ. The S 11 less than −10 dB is satisfied from 23.96 GHz to 24.06 GHz, and gain is 3.63 dB at frequency of 24 GHz. In the numerical analysis, the electromagnetic...
The offset fed planar inverted L antenna with built-in coplanar waveguide is proposed and numerically analyzed. The antenna characteristics of proposed antenna are almost same as those of the offset fed planer inverted L antenna. It is shown that the offset feed is easily realized by the built-in coplanar waveguide.
The characteristics of narrow-band and wideband models of unbalanced fed ultra low profile inverted L antenna are studied from the time response of voltage and current at the feed point. The antenna is excited by the Gaussian mono-cycle pulse generator. In the numerical analysis, the time domain solver of the electromagnetic simulator WIPL-D based on the Method of Moments is used.
The wireless power transmission system with the unbalanced fed inverted L antennas formed by coplanar waveguide on the rectangular conductor plane is proposed. The design frequency is 2.45 GHz. The size of the rectangular conducting plane is 48 mm by 56 mm, and height of the antenna element is 1 mm. In the case of the distance between transmitting and receiving antennas is 10 mm, the power transfer...
Two by two MIMO antenna composed of two inverted L antennas is proposed and numerically analyzed. Inverted L antenna formed by coplanar waveguide is printed on the dielectric substrate. The thickness of dielectric substrate is 3 mm, its relative permittivity is 2.6 and the loss tangent is 0.0022. When the size of dielectric substrate is 41.5 mm by 40 mm, the S11 less than −10 dB is satisfied from...
The offset fed planar inverted L antenna is proposed and numerically analyzed. The antenna characteristics of proposed antenna are compared with those of the planer dipole antenna. When the antenna size is 580 mm by 100 mm by 80 mm, the S11 less than −10 dB is satisfied at the frequency from 164 MHz to 293 MHz. At this frequency band, the directivity becomes 2.26 dBi to 3.84 dBi.
The triple band MIMO antenna composed of two unbalanced fed ultra low profile inverted L antennas with parasitic elements on the rectangular conducting plane is proposed for WiMAX applications of 2.3 GHz to 2.7 GHz, 3.3GHz to 3.8 GHz, and 5.25 GHz to 5.85 GHz. The inverted L parasitic element is located between the inverted L antenna and ground plane. In addition, the rectangular parasitic element...
The compact high gain planar antenna excited by the ultra low profile inverted L antenna is analyzed numerically. The unbalanced fed inverted L antenna is mounted on the rectangular conducting plane. Two parasitic conducting planes are located above the inverted L antenna. When the antenna size is 61 mm by 63 mm by 12 mm, S11 less than −10dB is satisfied at the frequencies from 2.20 GHz to 2.55 GHz...
A slot antenna on the rectangular conducting plane is studied by using the electromagnetic simulator WIPL-D based on the Method of Moments. The current distribution and the near field distribution are studied and their phenomenon are discussed for the purpose of the teaching of antenna for the undergraduate students.
The wireless power transmission system with the unbalanced fed inverted L antennas and with the base fed inverted F antennas are numerically analyzed and the requirement for the antenna is discussed. The antenna height is fixed as 7 mm or 12 mm. The distance between the transmitting and receiving antennas is 10 mm. The design frequency is 1 GHz. The S parameters and the near field distribution is...
The printed inverted L antenna on a dielectric substrate is proposed and numerically analyzed. This antenna is composed of the coplanar waveguide. When the size of antenna is 16 mm by 43 mm by 2.4 mm, the S11 less than −10 dB is satisfied from 2.39 GHz to 2.51 GHz. In this antenna, since the size of ground plane is small, the directivity becomes 3.4 dBi. When the size of antenna is 28 mm by 39 mm...
The wireless power transmission system composed of the base fed, ultra low profile inverted L antenna on a rectangular conducting plane is numerically analyzed. The input impedances of transmitting and receiving antennas become a few ohms depending on the distance between transmitting and receiving antennas. The size of conducting plane is 129 mm by 46 mm. The antenna height h is 7 mm (wavelength/43)...
The circular polarized antenna composed of an unbalanced fed ultra low profile inverted L antenna and a L shaped slot is proposed for the reader antenna of the portable terminal of RFID. At UHF band from 915 MHz to 930 MHz, the S11 less than−10dB and the axial ratio less than−3dB are satisfied. In the numerical analysis, the electromagnetic simulator “WIPL-D” based on method of moment is used.
As the multiple input multiple output (MIMO) antenna system, two ultra low profile inverted L antennas are located on the rectangular conducting plane is proposed and numerically analyzed. The directive gain of 4.12 dBi and the return loss bandwidth of 3.27% are achieved when the size of conducting plane is 0.45 λ by 0.45 λ (λ: wavelength). The results show the weak mutual coupling of the proposed...
An ultra low profile unbalanced inverted antenna is proposed, which is analyzed numerically and its characteristics are compared with those ultra low profile inverted L antenna and conventional base fed inverted antenna then compared with its measured results. The design frequency is 2.45 GHz. When the size of conducting plane is 0.245 λ by 0.49 λ and antenna height is λ/20, the return loss bandwidth...
The compact TV antenna composed of the unbalanced fed ultra low profile inverted L antenna is proposed. The antenna size is 40 mm by 244 mm by 32 mm. The return loss less than −10 dB is satisfied at the frequencies from 470 MHz to 713 MHz. The directivity is 2.83 dBi to 3.25 dBi.
The ultra low profile, conventional base fed F antenna is analyzed numerically and its characteristics are compared with those of the unbalanced fed, ultra low profile inverted L antenna. The design frequency is 2.45 GHz. When the size of conducting plane is 0.17 λ by 0.49 λ and the antenna height is 0.08 λ, the return loss bandwidth less than −10 dB becomes 15.92 % and the directivity is 3.94 dBi...
The WPT system composed of the unbalanced fed, ultra low profile inverted L antenna on a rectangular conducting plane is proposed and analyzed numerically. The input impedances of transmitting and receiving antennas are matched to 50 ohms by adjusting the length of horizontal element and the feed point position. The size of conducting plane is 550 mm by 1,283 mm. The antenna height h is 70 mm (wavelength/43)...
The input impedance of a horizontal dipole located very close to a perfect electric conducting plane becomes lower due to the existence of a metallic structure, and it approaches zero as the distance is decreased toward zero [1–3]. An “ultra low profile dipole (ULPD) antenna”, which is a horizontal dipole very closely located to an infinite conducting plane was proposed to solve the impedance matching...
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