Multi-function IC antenna design and application

Tang, Chia-Lun; Lai, Shih-Chi

doi:10.1109/apmc.2009.5385501

Cited by 5 publications

(8 citation statements)

References 4 publications

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“…The configurations of Ref1, Ref2, and Ref3 are also shown in the inset of Figures 3 and 4. From the results, it can be seen that Ref1 shows three resonant modes excited; however, the lowest one is at about 1000 MHz and with poor impedance matching, while the other two modes cannot be formed into a wide upper band for the antenna. With the inductive shorting strip formed for Ref2, the impedance matching for the lowest mode (the fundamental mode contributed by the longer radiating strip) at about 1000 MHz is improved, although it still cannot cover the desired lower band of 698–960 MHz.…”

Section: Resultsmentioning

confidence: 98%

“…To analyze the operating principle of the proposed antenna and the on‐board feeding structure, the comparison of the simulated return loss for the proposed antenna, the corresponding antenna with a direct feed and a simple shorting strip (Ref1), the corresponding antenna with a direct feed and an inductive shorting strip (Ref2), and the corresponding antenna with an inductive shorting strip and a chip capacitor–loaded feeding strip (Ref3) is presented in Figures 3 and 4. Notice that Ref2 is Ref1 with an inductive shorting strip, and Ref3 is Ref2 with a chip capacitor–loaded feeding strip. The configurations of Ref1, Ref2, and Ref3 are also shown in the inset of Figures 3 and 4.…”

Section: Resultsmentioning

confidence: 99%

“…Notice that Ref2 is Ref1 with an inductive shorting strip, and Ref3 is Ref2 with a chip capacitor–loaded feeding strip. The configurations of Ref1, Ref2, and Ref3 are also shown in the inset of Figures 3 and 4. From the results, it can be seen that Ref1 shows three resonant modes excited; however, the lowest one is at about 1000 MHz and with poor impedance matching, while the other two modes cannot be formed into a wide upper band for the antenna.…”

Section: Resultsmentioning

confidence: 99%

“…Surface‐mount chip antennas have been applied in the mobile phone as internal antennas for wireless wide area network (WWAN) operation [1–4]. Such surface‐mount WWAN antennas are mainly mounted on the no‐ground portion of the system circuit board of the mobile phone and can decrease the packaging cost of the internal antenna in the mobile phone.…”

Section: Introductionmentioning

confidence: 99%

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Bypassing phase 1 trials in the cancer drug development paradigm: Generally unwise and potentially dangerous

Markman

2010

Cancer

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The well-established standard approach to the development of systemic antineoplastic therapy begins with phase 1 trials, when new agents or novel combination drug strategies are initially introduced into the clinical setting. 1 Although the primary purpose of phase 1 trials is the determination of safety, these early clinical investigative efforts are also associated with several important secondary endpoints that are essential to future drug development, including: 1) carefully defining the overall toxicity profile and exploring strategies to mitigate serious side effects, 2) establishing both the dose and schedule for subsequent studies, 3) understanding the agent's pharmacokinetic or pharmacodynamic profile, 4) gaining preliminary evidence of efficacy, and 5) learning of the possible relations between proposed biomarkers and response or toxicity. Depending on the specific circumstances, phase 1 trials will be followed by 1 or more phase 2 efficacy and/or phase 3 randomized comparative studies.Unfortunately, this observer has noted a recent trend in which some oncology investigators have suggested bypassing formal phase 1 testing of presumably theoretically attractive new/novel antineoplastic drug combinations (cytotoxic and noncytotoxic), with the initial evaluation of the regimen being undertaken in the phase 2, or even phase 3, setting. 2 This commentary was written to challenge the need for, and wisdom of, this approach and to highlight the potential danger to research subjects participating in later stage trials that are not supported by rigorous phase 1 data.What follows are several possible justifications for considering early phase studies unnecessary before embarking on phase 2 to 3 efficacy trials, and a brief rebuttal to each suggested rationale for bypassing the conduct of well-designed and conducted phase 1 trials.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Bypassing phase 1 trials in the cancer drug development paradigm: Generally unwise and potentially dangerous

Markman

2010

Cancer

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“…In this article, we present a simple internal antenna design for eight‐band LTE/WWAN operation in the mobile phone, especially in the slim mobile phone which usually requires the thickness of the embedded antenna to be less than 4 mm [7–13]. The proposed antenna has a low profile of 3 mm only and is suitable to be disposed on a small no‐ground board space of 15 × 45 mm 2 at either the top or bottom edge of the system circuit board.…”

Section: Introductionmentioning

confidence: 99%

Planar strip monopole with a chip‐capacitor‐loaded loop radiating feed for LTE/WWAN slim mobile phone application

Chen

2011

Micro & Optical Tech Letters

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The radiation performance of a single feed circularly polarized stacked arrangement of edge truncated elliptical and conventional circular patches is presented in this communication and results are compared with that of a single layered edge truncated elliptical patch antenna. Though the single feed single layer edge truncated elliptical patch antenna presents circular polarization but its axial ratio bandwidth, impedance bandwidth and gain are low. Therefore this geometry is modified in this communication and a two layered stacked arrangement is proposed with much improved performance. By considering present arrangement, both impedance bandwidth and gain of antenna are improved to a great extent. Circular polarization with improved axial ratio bandwidth is achieved with present arrangement. The reported impedance bandwidth and axial ratio bandwidth are 27.9 and 3.33%, respectively which are significantly higher than that of conventional or edge truncated elliptical patch antenna geometry. The obtained results suggest that proposed antenna with little more improvement may become very useful for modern communication systems. ACKNOWLEDGMENTSThe authors thank Dr. S. Pal and Mr. V.V. Srinivasan from ISRO, Bangalore for permitting to use available facilities at ISRO, Bangalore. They also thank Mr. Shivareddy and Mr. Pawan Kumar for their help in testing of designed antennas. ABSTRACT: A small-size wideband internal mobile phone antenna formed by a planar strip monopole with a chip-capacitor-loaded loop radiating feed for achieving eight-band long term evolution/wireless wide area network operation in the 698-960 and 1710-2690 MHz bands is presented. The antenna is suitable to be disposed on a small noground board space (15 Â 45 mm 2 ) of the system circuit board and enclosed by an L-shaped system ground plane of the mobile phone. On the protruded ground of the L-shaped system ground plane, a universal series bus connector for the data port of the mobile phone can be accommodated without affecting the antenna performances. The antenna also shows a low profile of 3 mm above the circuit board, which makes it very promising for slim mobile phone applications. The proposed antenna was fabricated and tested. Measured and simulated results are presented. The specific absorption rate results of the antenna are also analyzed. Owing to the recent introduction of the long term evolution (LTE) operation [1] for mobile broadband services, the mobile devices such as the notebook computers and mobile phones in the near future are expected to be capable of both the LTE and wireless wide area network (WWAN) operations. For this application, the internal antenna in the mobile device should provide two wide operating bands of at least 698-960 and 1710-2690 MHz to cover three LTE bands (LTE700/2300/2500 in the 698-787/2300-2400/2500-2690 MHz bands) and five WWAN bands (GSM850/900/1800/1900/UMTS in the 824-894/880-960/1710824-894/880-960/ -1880824-894/880-960/ /1850824-894/880-960/ -1990824-894/880-960/ /1920824-894/880-960/ -2170. Sever...

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Small‐size 11‐band LTE/WWAN/WLAN internal mobile phone antenna

Chen¹

2010

Micro & Optical Tech Letters

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program. Type-B uncertainty is evaluated through a Monte Carlo simulation program [5]. The uncertainties in T min at all frequencies are below 5.1%, and the uncertainties in |C opt | are below 5.8%. The fitted reduced gain is within 0.065 dB difference from the values measured on the VNA ($32.4 dB) at all three frequency points. These results are comparable to the previous VTU measurements [2]. 5. DISCUSSION AND CONCLUSIONS 7. A.M. Abbosh and M.E. Bialkowski, Design of compact directional couplers for UWB applications, IEEE Trans Microwave Theory Tech 55 (2007), 189-194. 8. K.T. Park, Y.H. Cho, and S.W. Yun, Low voltage tunable narrow bandpass filter using cross-coupled stepped-impedance resonator with active capacitance circuit, IEEE MTTS Int Microwave Symp Dig,ABSTRACT: This work presents an internal mobile phone antenna occupying a small board space of 600 mm 2 on the system circuit board and providing three wide operating bands of at least 698-960, 1710-2690, and 5150-5825 MHz for the 11-band long term evolution (LTE)/ wireless wide area network (WWAN)/wideband local area network (WLAN) operation. This includes three LTE bands of LTE700/2300/2500, five WWAN bands of GSM850/900/1800/1900/UMTS, and three WLAN 2.4/5.2/5.8 GHz bands. The antenna is a coupled-fed shorted monopole, with a wide feeding strip in the coupling feed, a long shorting strip closely coupled to the shorted monopole, and a tuning stub connected to the shorting strip. The antenna's three wide operating bands are achieved and controlled by tuning the width of the feeding strip, the gap between the shorting strip and the shorted monopole, and the dimensions of the tuning stub. Operating principle of the proposed antenna is described in detail in this article. Results of the fabricated antenna are presented and discussed. The specific absorption rate results of the antenna with the presence of the user's head and hand are also studied. Figure 4Fitted results of LNA T min and LNA |C opt | from five day VTU measurements. Error bars indicate the standard uncertainty (1r)ABSTRACT: A novel forward and backward periodic microstrip antenna is presented and tested in this article. The experimental results show that the main lobe scans electronically from 140 to 30 in y-z plane when the operating frequency increases from 3.2 to 8 GHz. The

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Multi-function IC antenna design and application

Cited by 5 publications

References 4 publications

Bypassing phase 1 trials in the cancer drug development paradigm: Generally unwise and potentially dangerous

Bypassing phase 1 trials in the cancer drug development paradigm: Generally unwise and potentially dangerous

Planar strip monopole with a chip‐capacitor‐loaded loop radiating feed for LTE/WWAN slim mobile phone application

Small‐size 11‐band LTE/WWAN/WLAN internal mobile phone antenna

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