With the object of forming a compact antenna that operates in a plurality of frequency bands, the pattern of an antenna element that can resonate in a plurality of frequency bands is formed on the outer circumferential surface of an antenna bobbin . A parasitic conductor is inserted into an ...
PROBLEM TO BE SOLVED: To present maximum performance by easily resonating a miniaturized antenna and a portable antenna in a number of frequencies and further using all the physical lengths of these antennas for respective frequencies.;SOLUTION: In one miniaturized portable antenna, a number of frequ...
With the resonant HF antennas that I use, the RF transmission line losses are low and acceptable. (There is nothing magic about antenna “resonance” as far as effective radiation goes. The resonant antenna just helps keep the feedline losses to a minimum). Coax is flexible, tolerates rain,...
The HF-30 broadband shortwave antenna is a portable antenna that supports the full frequency range of shortwave, supporting the entire shortwave frequency range of 1.8-30MHz, with a standing wave of less than 3.5 for the entire range. Resonance occurs in the 20-meter frequency band. The maximu...
11. A through-the-earth portable radio characterized by: (a) a transmit antenna; (b) a receive antenna; and (c) radio circuitry linked to the transmit antenna and the receive antenna, the radio circuitry operable to: (i) generate a time division duplexed signal transmittable to a surface...
For reliable blood glucose sensing, it is vital to maximize the resonance strength and to perfectly confine the resonating electromagnetic fields within the permittivity sensing region of the sensor. Therefore, the design and geometrical parameters of the planar transmission line as well as the engraved...
大辰科技是台湾专业Portable制造服务商(成立于西元2006年).大辰科技来自知名的资讯产业研究机构在软体,硬体和系统整合方面保持强大的研发能力。通过其在台湾的自有IATF16949认证生产线和精心挑选的中国站点,LOCOSYS是I级/ II级合格供应商在汽车产业(design house,EMS,O
PORTABLE TERMINAL DEVICE AND ANTENNA RESONANCE FREQUENCY ADJUSTMENT METHOD USED FOR PORTABLE TERMINAL DEVICEPROBLEM TO BE SOLVED: To extend an effective band of a transmission/reception antenna of a non-contact IC card function of a portable terminal device.UCHIYAMA JIRO...
ANTENNA RESONANCE PREVENTION CIRCUIT FOR PORTABLE TELEPHONE SETPROBLEM TO BE SOLVED: To provide an antenna resonance prevention circuit of a portable telephone set capable of preventing gain deterioration due to the mutual interference of antennas.YAMAMOTO KENJI...
ANTENNA RESONANCE MATCHING ADJUSTMENT CIRCUIT AND PORTABLE TERMINALPROBLEM TO BE SOLVED: To reduce deterioration of communication characteristics due to distortion in an FET switch.NISHIBE TOSHIAKI西部 俊明