Source: https://patents.justia.com/patent/20160380331
Timestamp: 2019-10-14 03:00:30
Document Index: 394285651

Matched Legal Cases: ['§119', 'Application No. 2015', 'Application No. 2016', 'art.\n2', 'art.\n3', 'art.\n4']

US Patent Application for DIRECTIONAL COUPLER AND DIPLEXER Patent Application (Application #20160380331 issued December 29, 2016) - Justia Patents Search
Justia Patents US Patent Application for DIRECTIONAL COUPLER AND DIPLEXER Patent Application (Application #20160380331)
This Nonprovisional application claims priority under 35 U.S.C. §119 on Patent Application No. 2015-126655 filed in Japan on Jun. 24, 2015 and Patent Application No. 2016-111192 filed in Japan on Jun. 2, 2016, the entire contents of both of which are hereby incorporated by reference.
CITATION LIST Non Patent Literature [Non-Patent Literature 1]
Note that the high-frequency signal, which was caused exit from the second port P2, has a phase identical to that of the high-frequency signal which was caused to enter the first port P1. In contrast, the high-frequency signal, which was caused to exit from the third port P3, has a phase shifted by 90° from that of the high-frequency signal which was caused to enter the first port P1. That is, the phase of the high-frequency signal which is caused to exit from the second port P2 is shifted by 90° from the phase of the high-frequency signal which is caused to exit from the third port P3. For this reason, the directional coupler 1 is also referred to as a 900 hybrid.
In a case where (i) a first high-frequency signal is caused to enter the second port P2 and (ii) a second high-frequency signal whose phase is shifted by 900 from that of the first high-frequency signal is caused to enter the third port P3, a high-frequency signal, which is caused by superimposing the first high-frequency signal on the second high-frequency signal, is caused to exit from the first port P1. Thus, the directional coupler 1 also functions as a superimposing unit which receives high-frequency signals via respective two ports and then causes one high-frequency signal to exit via one port.
(λg/2)×n×0.8≦S≦(λg/2)×n×1.2 (1)
(λg/2)×0.8≦S≦(λg/2)×1.2 (2)
As is clear from FIG. 21, S(l,1) and S(1,4) were each less than −13 dB in a frequency domain of not less than 55 GHz and not more than 70 GHz. That is, it is found that the directional coupler 3 in accordance with Variation 13 can cut return losses in the frequency domain of not less than 55 GHz and not more than 70 GHz including a frequency of 60 GHz which is an operation frequency set at the time of the design. Furthermore, in a frequency domain of not less than 53 GHz and not more than 69 GHz, a difference between S(1,2) and S(1,3) was less than 1.0 dB. That is, it is found that the directional coupler 3 operates more suitably, as a directional coupler having a coupling degree of 3 dB, in a frequency domain of not less than 55 GHz and not more than 69 GHz.
(λg/2)×n×0.8≦S≦S(λg/2)×n×1.2 (1),
the protruding part of the second narrow wall protruding toward the first narrow wall by a protrusion amount larger at a center of the width varying part than at both ends of the width varying part.
2. The directional coupler according to claim 1,
the protrusion amount increases continuously as farther from the both ends of the width varying part and closer to the center of the width varying part.
3. The directional coupler according to claim 1,
the protrusion amount increases discretely as farther from the both ends of the width varying part and closer to the center of the width varying part.
4. The directional coupler according to claim 1,
5. The directional coupler according to claim 1,
6. A diplexer, comprising:
Patent Grant number: 10135108
International Classification: H01P 1/213 (20060101); H01P 5/18 (20060101);