a dual-broadband circularly polarized slot antenna for wlan applications antennas - fantasy-spa-toronto a compact RFID reader antenna operated on UHF band and WLAN

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Advancements in Wireless Communication: The Dual-Broadband Circularly Polarized Slot Antenna for WLAN Applications

The ever-increasing demand for robust and efficient wireless communication systems has driven significant innovation in antenna technology作者：HK Behera·2024·被引用次数：3—This paper introduces asquare slot antenna with circular polarization and dual-band capability. The structure of the antenna is similar to an L-shape patch.. Among the most promising solutions for modern wireless applications, particularly WLAN networks, is the dual-broadband circularly polarized slot antenna.Single-layer dual-broadband circularly polarised annular- ... This sophisticated antenna design offers a unique combination of properties that enhance signal integrity and performance in complex wireless environments. Researchers have extensively explored and developed various iterations of this antenna, focusing on achieving high performance across multiple frequency bands crucial for WLAN and other communication standardsSingle‐layer dual‐broadband circularly polarised annular‐slot ....

Understanding Circular Polarization and Dual-Band Operation

Circular polarization (CP) is a critical feature that distinguishes this type of antennadual-band circularly polarized slot. Unlike linear polarization, where electromagnetic waves oscillate along a single plane, circularly polarized waves rotate either clockwise or counterclockwise.作者：NO Parchin·被引用次数：29—This paper introduces a new simple-structureddual circularly polarized(CP)antennadesign for fifth-generation (5G) front end systems. This rotational characteristic provides a significant advantage: it mitigates the effects of signal fading and multipath interference caused by the relative orientation of the transmitting and receiving antennas. A circularly polarized antenna can effectively receive signals regardless of the polarization of the incoming wave, a property highly beneficial in dynamic wireless environments2016年4月28日—The proposedantennaachieves 10 dB return loss bandwidths and 3 dB axial ratio (AR) in the frequency bands 2.39–2.81 GHz and 5.42–5.92 GHz, .... This inherent capability makes it ideal for applications where antenna orientation might be inconsistent or subject to change.Circularly Polarized Dual Band Dual Slot Antenna for ...

The "dual-band" aspect refers to the antenna's ability to efficiently operate at two distinct frequency ranges simultaneously.A Dual-Broadband Circularly Polarized Slot Antenna for ... For WLAN applications, these bands typically align with the globally recognized 2.A Dual-Broadband Circularly Polarized Slot Antenna for ...4 GHz and 5 GHz ISM bands, which are fundamental for Wi-Fi and other wireless local area network services. By supporting both dual band operations, these antennas offer flexibility and cater to the diverse spectrum needs of modern devices, enabling seamless transitions between different Wi-Fi channels and enhancing overall network capacity.Single-layer dual-broadband circularly polarised annular- ... Several studies have reported antennas capable of resonating within specific frequency ranges, such as 2.4, 5.2, and 5A Dual-Band Circularly Polarized Slot Antenna with EBG ....8 GHz, demonstrating the practical realization of this dual-band capability.2025年8月6日—A new antenna with dual-band circular polarizationfor the reception of WiMAX and WLAN is presented in this article. For instance, one notable design achieves 10 dB return loss bandwidths in the 2.39–2.81 GHz and 5dual-band circularly polarized slot.42–5.作者：WC Weng·2014·被引用次数：63—In this case, acircularlypolar- ized (CP)antennais advantageous for awirelessdevice since it is able to receive any linearlypolarized(LP) ...92 GHz frequency bands, with a 3-dB axial ratio bandwidth, which is crucial for effective circular polarization.作者：K Mekki·2026—Lai, F.-P. & Chen, Y.-S. Abroadband dual-polarized antennawith pattern reconfigurability for multi-tag detection in chipless RFID. IEEE Trans.

Key Design Features and Innovations

The fundamental structure of a dual-broadband circularly polarized slot antenna typically involves a slot cut into a conducting ground planeA Dual-Band Circularly Polarized Slot Antenna with EBG .... Various modifications and feeding techniques have been employed to achieve the desired performance characteristics. Square slot antenna designs are common, with researchers exploring variations like the square slot antenna with circular polarization and dual-band capability to optimize both impedance matching and axial ratio.

One innovative approach involves using a compact RFID reader antenna operated on UHF band and WLAN concurrently, showcasing the versatility of slot antenna designs. Another significant area of research is the antenna's feeding mechanism. CPW-fed (Coplanar Waveguide-fed) designs are frequently utilized due to their ability to provide a compact and efficient structure for achieving dual circularly polarized radiation.A Dual-Broadband Circularly Polarized Slot Antenna for WLAN ... For example, a CPW-fed slot antenna for WLAN applications has demonstrated resonant dips at 3A compact, dual wide-band circularly polarized, modified ....56 GHz and 5.12 GHz, highlighting its suitability for specific communication bands.

Furthermore, the integration of electromagnetic band-gap (EBG) structures has been explored to enhance the antenna's performance, particularly to achieve a high-gain dual-band circularly polarized (CP) microstrip slot antennaA novel dual-band, circularly polarized slot antennawith broadband characteristics in both axial ratio and impedance is developed.. These structures can help suppress unwanted surface waves and improve radiation efficiency, leading to better overall link budgetsBroadband Circularly Polarized U-Slot Antenna for Wireless .... The use of specialized substrates, such as FR-4, with modifications like a modified square slot antenna, has also been investigated to create dual band circularly polarized operation in compact form factors.

The pursuit of miniaturization is another key focus作者：R Ferreira·2017·被引用次数：51—This very compact and low profileantennasare suitable for 2.4. GHzwirelesslocal area network communication systems. Index Terms—Cavity backedantennas, .... Researchers have developed compact and low-profile antenna designs suitable for 2.4 GHz wireless local area network communication systems, often employing techniques like cavity backing. This miniaturization is essential for integration into portable devices and space-constrained applications.

Performance Metrics and Practical Applications

The efficacy of a dual-broadband circularly polarized slot antenna is typically evaluated based on several performance metrics, including:

* Impedance Bandwidth: This refers to the range of frequencies over which the antenna's impedance is well-matched to the transmission line, defined by a return loss (S11) below a certain threshold (e.gA compact, dual wide-band circularly polarized, modified ...., -10 dB).A Novel Dual‐Band Circularly Polarized Rectangular Slot ... A wider impedance bandwidth indicates better signal transfer at those frequenciesThis paper presentsthree dual-band, dual-linearly polarized antenna configurationsfor UHF-RFID and WLAN applications. The first configuration consists of a ....

* Axial Ratio (AR): This parameter quantifies the quality of circular polarization. A lower axial ratio (ideally close to 0 dB within the operational bands) signifies a more purely circularly polarized wave, leading to reduced polarization mismatch losses. Studies have achieved 3-dB axial-ratio bandwidths approximating 160/90 MHz at 2.4/5.5 GHz, demonstrating effective CP performance.A compact dual-circularly polarized cavity- backed ring-slot ...

* Gain: The antenna's ability to focus radiated power in a specific direction. High gain is desirable for extending communication range and improving signal strength.作者：S Patil·2019·被引用次数：13—This paper presents a compact microstripantennausing FR-4 substrate fordual band circularly polarizedoperation using a modified square ...

* Radiation Pattern: The spatial distribution of the antenna's radiated power. For WLAN applications, an omnidirectional or wide beamwidth pattern is often preferred to cover a broad area.

The applications for these advanced antennas are extensive作者：K Mekki·2026—Lai, F.-P. & Chen, Y.-S. Abroadband dual-polarized antennawith pattern reconfigurability for multi-tag detection in chipless RFID. IEEE Trans.. Beyond general WLAN and Wi-Fi, they are crucial for:

* WiMAX (Worldwide Interoperability for Microwave Access) systems: Supporting high-speed broadband wireless access.

* RFID (Radio-Frequency Identification) systems: Enhancing read range and reliability, particularly for UHF-RFID and chipless RFID applications.

* 5G communication systems: Contributing to the development of next-generation mobile networks.

* Satellite communications: where polarization diversity is critical for robust signal reception.A compact dual-circularly polarized cavity- backed ring-slot ...

The research into dual-broadband circularly polarized slot antennas represents a significant leap forward in antenna engineering.The antenna presented in this paper is abroadband circularly polarized U slot antenna. The circularly polarized radiation is achieved in this paper by ... By offering simultaneous operation across multiple critical frequency bands with the resilience of circular polarization, these antennas are poised to play a pivotal role in shaping the future of wireless communication, ensuring