Approximate Analysis of Short Circuited Ring Patch Antenna Working at&lt;tex&gt;$rm TM_01$&lt;/tex&gt;Mode

González-Posadas, V.; Segovia-Vargas, D.; Rajo‐Iglesias, Eva; Vazquez-Roy, Jose Luis; Martín-Pascual, C.

doi:10.1109/tap.2006.875925

Cited by 69 publications

(33 citation statements)

References 6 publications

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“…The resonant frequency of the orthogonal modes created by the shunted stubs are derived as follows. The SAP resonant frequency is given by [10] …”

Section: Shunted Stubs For Circular Polarizationmentioning

confidence: 99%

“…(2), J m and N m are the mth order Bessel functions of the first and second kinds, respectively, and the prime denotes the first derivative [10]. The characteristic Equation (2) is derived from the boundary conditions of the SAP antenna, as discussed in detail in [11].…”

Section: Shunted Stubs For Circular Polarizationmentioning

confidence: 99%

“…The characteristic Equation (2) is derived from the boundary conditions of the SAP antenna, as discussed in detail in [11]. The dimension a eff is a correction value for the patch outer radius that accounts for fringing fields, which is given in [10] as…”

Section: Shunted Stubs For Circular Polarizationmentioning

confidence: 99%

“…(3) is given as 0.75 in [10] for a SAP that has a substrate extending beyond the patch to the edge of the ground plane. However, for the prototype antenna presented here, the substrate only extends to the edge of the patch, and we get a better agreement for the predicted resonance with a value of κ = 0.5.…”

Section: Shunted Stubs For Circular Polarizationmentioning

confidence: 99%

“…Equation (5) defines an effective change in the SAP inner radius when the feed is aligned with the stub as shown in Figure 4(a). Since the vertical electric fields, E z , for the TM 11 mode of the SAP antenna are proportional to cos φ [10], where φ = 0 • is the location of the feed pin, the cumulative contribution of the stub falls off with the cosine of its angular width. The second term on the right-hand side of Eq.…”

Section: Shunted Stubs For Circular Polarizationmentioning

confidence: 99%

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A Horizon Ring Nulling Shorted Annular Patch Antenna With Shunted Stubs

McMichael¹,

Lundberg²,

Hanna³

et al. 2017

PIER M

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Abstract-A dual-band shorted annular ring patch antenna with interference rejection at the horizon is presented for GPS timing applications. It is shown that the dimensions of the annular ring can be optimized to make a null in the RHCP pattern at low elevation near the horizon for all azimuth angles. This null attenuates interfering signals originating from ground based sources. The antenna achieves circular polarization utilizing radial shunted stubs. The effect of the stubs on the resonance is analytically derived and verified through simulations. A novel feed configuration that incorporates a coplanar waveguide transition improves the impedance match for both L1 and L2 GPS frequency bands compared to previous designs that present compromises between the feed impedance of the two bands. Additionally, since the shunted stubs reduce the number of required electronic components compared to other antennas with similar horizon nulling capability, the cost is reduced. A prototype antenna operating at GPS L1 and L2 bands has been fabricated and validated through measurements.

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“…The resonant frequency of the orthogonal modes created by the shunted stubs are derived as follows. The SAP resonant frequency is given by [10] …”

Section: Shunted Stubs For Circular Polarizationmentioning

confidence: 99%

Section: Shunted Stubs For Circular Polarizationmentioning

confidence: 99%

Section: Shunted Stubs For Circular Polarizationmentioning

confidence: 99%

Section: Shunted Stubs For Circular Polarizationmentioning

confidence: 99%

Section: Shunted Stubs For Circular Polarizationmentioning

confidence: 99%

See 3 more Smart Citations

A Horizon Ring Nulling Shorted Annular Patch Antenna With Shunted Stubs

McMichael¹,

Lundberg²,

Hanna³

et al. 2017

PIER M

View full text Add to dashboard Cite

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Design of wideband bandpass filter using short‐circuited circular patch resonator loaded with slots

Yang

et al. 2020

Int J RF Microw Comput Aided Eng

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This paper presents a wideband bandpass filter design based on a shortcircuited circular patch resonator with inductively loaded slots. The cavity model method is used to analyze the excited resonances of the resonator. According to the illustration of the cavity model, the TM 010 mode is excited as the fundamental mode, the resonant frequency of which is much lower than that of the TM 110 mode and can be further lowered by the loaded arc-oriented slots. Therefore, the proposed resonator can be used to design a filter with compact size. In addition, one of the two orthogonal degenerate TM 110 modes can be independently tuned by the slot along the symmetric plane without affecting the TM 010 mode. Since the resonant frequency of each mode can be tuned independently by the parameters of the slots, and the coupling between resonant modes of the resonator and source/load can be adjusted by the feeding angle and the capacitive loaded stubs on the feeding lines, the center frequencies and bandwidths of the designed bandpass filters can be tuned easily. The analysis is theoretically and experimentally verified by two examples with good agreement between the simulated and measured results.

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