Slow wave antenna
Leaky-wave antenna (LWA) belong to the more general class of traveling wave antenna, that use a traveling wave on a guiding structure as the main radiating mechanism. Traveling-wave antenna fall into two general categories, slow-wave antennas and fast-wave antennas, which are usually referred to as … Visa mer The traveling wave on a Leaky-Wave Antenna is a fast wave, with a phase velocity greater than the speed of light. This type of wave radiates continuously along its length, and hence the propagation … Visa mer Groove guide (shown in Fig. 5) is a low-loss open waveguide for millimeter waves, somewhat similar to the NRD guide: the dielectric central region is replaced by an air region of larger width (greater than λ0/2). The field again decays exponentially in the regions of … Visa mer A typical example of a uniform leaky-wave antenna is an air-filled rectangular waveguide with a longitudinal slot. This simple structure … Visa mer In response to requirements at millimeter wavelengths, the new antennas were generally based on lower-loss open waveguides. One … Visa mer An interesting variation of the previous structures has been developed and analyzed. It is based on a ridge or stepped waveguide rather than a rectangular waveguide. In the … Visa mer Webb16 juni 2008 · The purpose of slow wave is to slow down the propagation phase velocity. In this article, the antenna design increases the equivalent inductance and capacitance for antenna resonance. The relationship among phase velocity, capacitance and inductance is where v p =phase velocity L=equivalent inductance C=equivalent capacitance
Slow wave antenna
Did you know?
WebbAbstract—Miniaturization of slow wave antennas exploiting the slow wave enhancement factor is presented.The printed antennas are periodically loaded with shunt capacitors to … Webb30 apr. 2024 · In this communication, we propose a high scanning rate leaky-wave antenna (LWA) based on a slow-wave substrate integrated waveguide (SIW) structure. The slow-wave effect is introduced by etching periodical slots on the top surface of SIW. The LWA radiation is subsequently realized by introducing sinusoidal modulation to the slots …
WebbScanning Rate Enhancement of Leaky-Wave Antennas Using Slow-Wave Substrate Integrated Waveguide Structure Abstract: In this communication, we propose a high … Webb6 dec. 2009 · In this paper, a design of a submillimeter wave antenna fed by a slow wave structure is described. The antenna is useful in high-power THz applications because of its ability to directly radiate ...
Webb21 mars 2024 · These antennas begin as a transmission line structure that flares out slowly, providing a low reflection transition from a transmission line to free space. The bandwidth can be very large and is primarily dependent on how gradual the transition is. One of the more interesting traveling-wave antennas is the Vivaldi antenna of Figure … WebbMiniaturization of slow wave antennas exploiting the slow wave enhancement factor is presented. The printed antennas are periodically loaded with shunt capacitors to slow down the guided wave in the structures. In this paper, the loaded unit cell of the equivalent transmission line model is utilized to extract the slow wave enhancement factor, the …
WebbThis paper investigates a 220 GHz quasi-optical antenna for millimeter-wave wireless power transmission. The quasi-optical antenna consists of an offset dual reflector, and fed by a Gaussian beam that is based on the output characteristics of a high-power millimeter-wave radiation source-gyrotron. The design parameter is carried on by a numerical code …
Webb4 mars 2024 · Millimeter wave (mmWave) wireless technology has become a part of human life for high-speed and secure data transmission. This paper presents a square-slotted microstrip patch antenna at 37 GHz resonant frequency for mmWave wireless communication. The antenna consists of one H-slot and one inverted T-slot loaded over … theorem translateIn radio and telecommunication, a traveling-wave antenna is a class of antenna that uses a traveling wave on a guiding structure as the main radiating mechanism. Its distinguishing feature is that the radio-frequency current that generates the radio waves travels through the antenna in one direction. This is in contrast to a resonant antenna, such as the monopole or dipole, in which the antenna acts as a resonator, with radio currents traveling in both directions, bouncing back and f… theorem von theveninWebbIn slow-wave antenna, the guided wave is a slow wave, meaning a wave that propagates with a phase velocity vph that is less than the speed of light in free space. theorem von youngWebbAntenna pattern in different dispersion regions. (a) Slow wave. (b) Left-handed fast wave. (c) Broadside. (d) Right-handed fast wave. The above theory is the principle of wide … theorem theory 区别Webb11 mars 1999 · Disclosed is a broadband, miniaturized, slow-wave antenna (100) for transmitting and receiving radio frequency (RF) signals. The slow-wave antenna comprises a dielectric substrate (106) with a traveling wave structure mounted on one surface, and a conductive surface member (109) mounted on the opposite surface. theorem versus postulateWebb1 mars 1990 · The coupling of the fast wave antenna to short wavelength waves is analysed by taking into account the imperfect alignment of the antenna screens along … theorem vs formulaWebb19 okt. 2016 · Slow-wave structures in the form of equally distributed square metal pins are symmetrically loaded inside the horn aperture along the center line of the broad walls. The loaded slow-wave structure has a great influence on wave around the center while having little influence on wave around the slant narrow walls. theorem vs corollary