Further investigations into edge-fed cavity backed patches

Optimizing the Size of A Multi-Layered Patch Antenna for K-Band Applications

“…Compatible with Monolithic Microwave Integrated Circuit (MMIC) designs, such as Cell phones [2], [3] The simplest typical structure of a patch antenna consists of a radiating element printed on a dielectric substrate disposed on a ground plane [4]. At present, satellite communication in the K-band is of major interest for the development of telecommunication systems such as satellite television channels [5],because this band has a large number of unused bandwidth [2] One of the effective techniques for the miniaturization of this type of antenna is the use of a dielectric substrate having a high dielectric constant [6].Indeed, the ceramic materials provide adequate dielectric permittivity; in addition they possess very useful physical properties [7] [8].Several works have been published to increase the bandwidth [9], [10], but they have a relatively large antenna size [11] however we find other works that proposed a miniaturized size but with A very narrow bandwidth [12]. This work presents a miniaturized antenna with a wider bandwidth by using a second layer of the dielectric substrate while introducing an air-filled cavity into the lower substrate of the microstrip antenna.…”

Cavity backed hi-lo stacked patch antennas

“…A variation of this cavity backed procedure [2] can be applied to radiators that can be directly integrated on Monolithic Microwave Integrated Circuit (MMIC) and Opto-Electronic Integrated Circuit (OEIC) materials [3]. The new configuration potentially overcomes the trade-offs associated with trying to develop patch-based radiators on very thin, high dielectric constant material.…”

“…At previous symposia we have introduced edge-fed cavity backed patch antennas as an alternative to a conventional edge-fed configuration that overcomes several of the inherent issues associated with this architecture [1,2]. We have shown both theoretically and experimentally that this dielectric filled cavity backed radiator has significantly higher efficiency and less pattern scalping than a traditional edge-fed patch for two reasons: (i) the cavity reduces the amount of surface wave propagation; and (ii) the thin substrate layer used to etch the feed network allows for a thinner track width to realize a 50 Ω characteristic impedance, and therefore reduces spurious radiation from the feed network.…”

“…This combination of high and low dielectric constant microwave laminates produces an efficient broadband printed antenna. In this paper we investigate applying the hi-lo substrate architecture to the edge-fed cavity backed patches on high permittivity material in [2] with a view to significantly expanding the usable bandwidth. Figure 1 shows a schematic of an integratable edge-fed cavity backed patch similar to the one developed in [2].…”

“…In this paper we investigate applying the hi-lo substrate architecture to the edge-fed cavity backed patches on high permittivity material in [2] with a view to significantly expanding the usable bandwidth. Figure 1 shows a schematic of an integratable edge-fed cavity backed patch similar to the one developed in [2]. This was used as the basis for the investigation into the bandwidth enhancement will the application of the hi-lo technique.…”