Band Rejection Methods for Planar Log-Periodic Antennas

Mruk, Joseph R.; Kefauver, W. Neill; Filipović, Dejan S.

doi:10.1109/tap.2010.2048873

Cited by 8 publications

(5 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar work on this has also been reported in [8][9][10]. In contrast to wide to narrowband reconfiguration, work in [11][12][13][14] demonstrates band notch method for log periodic antennas. In this paper a novel log periodic antenna with the potential for switched band functionality to operate in a wideband or narrowband mode is presented.…”

Section: Introductionsupporting

confidence: 69%

Wideband Reconfigurable Log Periodic Patch Array

Hamid¹,

Hall

Gardner

2013

PIER C

View full text Add to dashboard Cite

Abstract-This paper presents a novel wideband to narrow band reconfigurable log periodic aperture coupled patch array. The wide to narrow band reconfiguration is realized by closing a selected group of slot apertures, to deactivate the corresponding group of patches. The patches are fed with a modulated meander line through aperture slots. A wideband mode from 7-10 GHz and three selected narrow band modes at 7.1, 8.2 and 9.4 GHz are demonstrated. Potentially, the number of sub bands can be increased or decreased as can the bandwidth of the sub bands by selecting a specific number of active elements. To verify and demonstrate the proposed design method, a prototype has been developed with ideal switches. Very good agreements between the measured and simulated results are presented.

show abstract

Section: Introductionsupporting

confidence: 69%

Wideband Reconfigurable Log Periodic Patch Array

Hamid¹,

Hall

Gardner

2013

PIER C

View full text Add to dashboard Cite

show abstract

“…The relationship between two consecutive resonant frequencies of consecutive dipoles is f n− 1 / f n = τ , for any n , which can be used to determine the desired rejection bands. The proposed tag thus consists of a LP antenna aperture from which a specific combination of resonant dipoles is removed to introduce a band‐rejection in the gain response of the antenna, as first demonstrated in [10]. By choosing a specific combination of the resonant dipoles, the presence or absence of a null in the gain at a given frequency can be tailored, thereby realising a specific RFID code.…”

Section: Lp Dipole Array Tagmentioning

confidence: 99%

Log‐periodic dipole array antenna as chipless RFID tag

Gupta

Roberts

et al. 2014

Electron. lett.

View full text Add to dashboard Cite

A passive chipless Radio-frequency identification (RFID) tag based on logperiodic (LP) dipole array is proposed, where the tailorable band-rejection property of the LP aperture is utilized to realize large number of codes. The proposed tag principle is successfully validated using measurements, where the absence and presence of the band-rejection, is shown to carry the bit information. Its fabrication simplicity is also demonstrated by its implementation on a flexible substrate. Finally, two different tag formation schemes, based on specific set of resonance suppressions, are discussed in detailed.Introduction: Radio-frequency identification (RFID) systems have found diverse applications in the field of communications, ticketing, transportation, logistics, tracking, inventory, human identification, and security, to name a few [1]. A typical RFID system comprises an interrogator (also called a reader) and many tags (also called labels). Recently, there is a strong research interest in passive chipless RFID tags, where the absence of the power supply and the integrated circuits (ICs), has shown promise for low-cost RFID solutions [2]. Chipless tags, in particular, are useful under extreme environments such as extremely high or low temperatures that are not suitable for ICs. However, they are typically restricted to relatively small distances from the reader and suffer from low number of bits that can be encodedRecently, a log-periodic dipole antenna aperture is proposed to be used as a information coding element in a chipless tag [6], to realize large number of bits. This paper provides the experimental validation of the LP based tag along with detailed discussion on its tag properties, with a focus on its design flexibility. Log-Periodic Dipole Array (LPDA) Tag: A log-periodic (LP) antenna has

show abstract

“…Here, a toothed logperiodic antenna is reconfigured at time t 1 in response to a detected interference source. A pair of teeth with resonance frequency corresponding to the interference frequency is omitted from the antenna (as in [18]) to produce a rejection band in the antenna's response. Such a reconfigurable antenna would be useful for cognitive radios in congested environments and for electronic warfare sensors.…”

Section: Introductionmentioning

confidence: 99%

Dynamically Reconfigurable Microwave Circuits Leveraging Abrupt Phase-Change Material

Connelly,

Chisum

2020

Preprint

View full text Add to dashboard Cite

This article proposes a concept for dynamically reconfigurable distributed microwave circuits by leveraging the abrupt conductivity transition in phase-change materials (PCM). Metallic surface-inclusions ( λ) are embedded in the PCM film-vanadium dioxide (VO2)-to provide low-loss and reconfigurability. To validate this concept, a variety of co-planar waveguide transmission lines are designed and fabricated with metallic surface-inclusions in VO2 films, and the lines' performance are characterized up to 50 GHz. The measured results are used to develop a transmission-line based model and an equivalent circuit model of the VO2 with surface-inclusions to aid in the rapid design of new structures. Additionally, an electromagnetic model was developed and indicates that loss can be close to that of conventional metallic distributed circuits with 100 to 200 nm thick VO2 films. With these thicker films, two practical realizations of this concept were designed and simulated: a tunable dipole from 2.13 to 9.07 GHz and a tunable triple-stub matching network from 5 to 40 GHz with high |Γ|. Therefore, the proposed method appears viable for the realization of arbitrary programmable distributed circuits and antennas in the microwave and lowmillimeter-wave bands.

show abstract

Band Rejection Methods for Planar Log-Periodic Antennas

Cited by 8 publications

References 13 publications

Wideband Reconfigurable Log Periodic Patch Array

Wideband Reconfigurable Log Periodic Patch Array

Log‐periodic dipole array antenna as chipless RFID tag

Dynamically Reconfigurable Microwave Circuits Leveraging Abrupt Phase-Change Material

Contact Info

Product

Resources

About