Resonant microstrip meander line antenna element for wide scan angle active phased array antennas

Abstract

A novel UWB bandpass filter topology with broad stopband rejection is proposed. The experiment filter has 122% 3-dB bandwidth, less than 1.5 dB in-band insert losses, the variation of group delay less than 0.2 ns, and a wide stopband bandwidth with 17 dB attenuation up to 20 GHz. The design method is that the broadband stopband filter is internally embedded within the section between two short-circuited stubs of the broadband bandpass filter, which is not increase the size. With the lowpass and bandpass filter designed separately, the method is more convenient and easily implemented. This compact and high performance lowpass filter should be useful for many broad system applications.

Investigation of Using High Impedance Surfaces for Wide-Angle Scanning Arrays

“…10. The actual array pattern Earray can be obtained by using formula (2), where Em(θ,φ) is the measured active pattern of the mth element (m=1, 2, …, 8) [28]. Each element of the array is fed by a current of equal amplitude and uniform progressive phase α.…”

“…13. These scan patterns were synthetized by using the measured active element patterns according to formula (2). For comparison, the simulated scan performance is also provided in Fig.…”

“…Grounded microstrip antenna s possess attractive features such as a low profile, being conformable and not easily affected by backing materials, thus remaining one of the main types of array antennas. Wide-angle scanning phased arrays constructed using this design are capable of scanning their main beam up to 60° from the broadside [2]- [4]. In order to further extend the beam-scanning range, several methods have been proposed in the literature.…”

Wide beamwidth planar self‐balanced magnetic dipole antenna with enhanced front‐to‐back ratio

“…Wide beamwidth antennas have been widely used in broadcasting, navigation, and wireless communication systems . In the past few decades, various wide beamwidth antenna design approaches have been developed intensively.…”

“…Wide beamwidth antennas have been widely used in broadcasting, navigation, and wireless communication systems. [1][2][3] In the past few decades, various wide beamwidth antenna design approaches have been developed intensively. These approaches can be basically categorized into five distinctive types in terms of operation principle.…”