A novel antipodal Vivaldi antenna with tapering serrated structure at the edges is proposed. Compared with traditional Vivaldi antennas without serrated structure, the gain of the designed antenna is significantly improved in the desired frequency band (4.5- 7.5 GHz). In addition, a 2 x 2 Vivaldi antenna array with an orthorhombic structure is designed and fabricated to achieve a circular polarization (CP) characteristic. With this configuration, the 3 dB axial ratio bandwidth of the array reach

在这封信中，提出了一个共同设计的天线滤波器。 天线滤波器由微带贴片天线和发夹式滤波器组成，两者共享同一接地平面以减小尺寸。 代替使用传统的50-Omega接口，滤波器和天线之间的阻抗被优化以提高性能。 仿真和测量结果表明，与具有50个接口阻抗的传统天线滤波器相比，共同设计的天线滤波器具有更好的带宽（4.7％，4.06-4.26 GHz）和更大的增益（4.3 dBi）。

A new multi-sleeve monopole antenna for APP terminal communication is proposed and compared with the conventional sleeve monopole antenna. The prototype of the proposed antenna is constructed and simulated, which shows that the proposed antenna features excellent radiation characteristics against th

Game-Theoretic Beamforming and Power Allocation in MIMO Cognitive Radio Systems with Transmitter Antenna Correlation

The properties of terahertz (THz) radiation pulses emitted by a metallic, large aspect ratio carbon nanotube antenna have been studied both in the THz waveforms and field distribution. The peak THz field up to 2.66 and 1.26 kV/cm are observed at the probe points. The proposed antenna is designed to operate for dual frequency applications from 2.36 to 2.58 THz and from 7.27 to 7.5 THz for less than dB return loss.

k3ng_rotator_controller：K3NG Arduino业余无线电旋转器控制器

k3ng_antenna_tuner：基于Arduino的自动业余无线电天线调谐器

Transmission line length formula for coaxial cable to an antenna.zip

经典的天线书籍

Antenna Theory Analysis and Design(3rd Edition,Constantine A. Balanis著，高清电子版），带有书签目录，方便检索查询