TEM‐TE ₁₁ mode converter antenna like a pelican beak

Abstract

In this study, a design, simulation, fabrication, and measurement of the TEM‐TE11 mode converter antenna (MCA) like a pelican beak are investigated. The working frequency of the pelican beak‐shaped MCA (PBMCA) is the frequency in the range of 3.9–4.6 GHz (700 MHz bandwidth). Due to increasing the antenna cross‐section, the probability of the electrical breakdown dramatically reduces. Electrical breakdown may occur at very high power outputs of the electromagnetic sources. The power‐handling capacity of the PBMCA is 829 MW, at the centre frequency. The antenna is simulated and measured at three frequencies. The simulation results are a good agreement with the measurement results.

An only metal, compact, and circular polarizer designed with helical array rods

“…To generate a CP field, it must be equally excited in two perpendicular axes (for example, X and Y ). This issue alone will not be enough to generate a CP field, but the phase difference between the two excited fields in the X and Y directions must be 90° [2–23]. If the phase difference is zero degrees, the polarization will be slant.…”

“…The CPW proposed in [5] is a mode converter. The mode converters installed to the outlet of the electromagnetic sources to convert a donut-shaped pattern to a directive one are the waveguides that transduce a TM 01 or mode to a TE 11 mode or to a TE 10 mode in the circular and rectangular waveguide, respectively [6][7][8][9][10][11][12][13][14][15][16]. The CPW, introduced in [5], is a mode converter that converts an LP-TM 01 mode to a CP-TE 11 mode.…”

An Only Metal, Compact, and Circular Polarizer Designed with Helical Array Rods

“…[5], is a mode converter. The mode converters installed to the outlet of the electromagnetics sources to convert a donut-shaped pattern to a directive one are the waveguides that transduce a TM 01 or TEM mode to a TE 11 mode and or to a TE 10 mode, in the circular and rectangular waveguide, respectively [6][7][8][9][10][11][12][13][14][15][16]. The CPW introduced in Ref.…”

Wide-band conversion of donut-shaped pattern to directive one by square-shaped pattern director antenna

“…Note that some electromagnetic diodes have Transverse electromagnetic (TEM) or TM 01 mode outputs [5,6]. For example, the magnetically insulated line oscillator (MILO) and coaxial-vircator generate fields in TEM and TM 01 modes [7,8], respectively, which is not suitable. A horn antenna or an open-ended waveguide radiating these modes to generate donut-shaped patterns cannot affect a target point effectively.…”