专利摘要:
A microwave balun using TEM wave guides, consists of two second-order reactance sections of electrical lengths equal to about a quarter of the wavelength of a radiofrequency signal comprising an unbalanced input-port and a balanced output-port. Each section (I, II) comprises two strips of microstrip-like wave guides, placed in such a way above the ground plane being the bottom metallization (0) of the lower layered substrate (3) that one of the guides (1, 2) is on the top side of the lower substrate, and the other guide (1', 2') placed thereabove is separated therefrom by the material volume of the upper layered substrate (4) and is on the top side of the upper substrate. The pair of guides, any one from each section, being the pair of input guides (1, 2) is connected with each other by two ends (12, 21), while one of the two remaining ends (11) thereof is connected to the input-port (10), and the other one (22) is terminated for a radio-frequency signal by a reflecting element. The second pair of the remaining wave guides (1', 2') being the pair of output guides, forms with two ends (12', 21' ) thereof, one from each section, a pair of output-port terminals. Each of the remaining ends (22', 11') of the pair of output guides is terminated for a radio-frequency signal by a reflecting element, whereby phases of the said reflecting elements are dependent on the configuration choice of the input and the output-ports and the phase choice of the reflecting element terminating the end of input guides, the opposite one to the input. The cross-section dimensions and material constants of materials used have the values dependent on the required broadband properties according to the set of transmission-reflection parameters of the balun and the required input and output impedance. The balun design according to the invention is designed for utilization within the frequency range of 1-18 GHz.
公开号:SU1510726A3
申请号:SU843817577
申请日:1984-11-28
公开日:1989-09-23
发明作者:Марчэвски Войцех;Немыйски Вацлав
申请人:Польска Акадэмия Наук, Цэнтрум Бадань Космичных (Инопредприятие);
IPC主号:
专利说明:

3151
This invention relates to microwave technology and can be used in miniature devices, including monolithic ones.
The purpose of the invention is to increase integration.
On. FIG. 1 shows the construction of a simulator; 2, the location of its main conductors in one of its variants.
The balancing device contains a half-wave conductor 1, open at the end and located between two dielectric substrates 2 and 3, on the outer side of the first of which there are two quarter-wave conductors 4 and 5 located along the AA axis of the half-wave conductor 1 - and the end 6 of the first one and the beginning 7 of the second is separated by a gap 8 located opposite the middle part of the half-wave conductor 1. On the outer side of the second dielectric substrate 3 is the fourth conductor 9, with the beginning of the half-wave half the superconductor 1, the beginning 11 of the first quarter-wave conductor 4 and the beginning of the fourth conductor 12 are single-ended input, and the end 6 of the first quarter-wave conductor 4 and the start 7 of the second quarter-wave conductor 5 are symmetrical output.
The beginning 11 of the first quarter-wave conductor 4 and the end 13 of the second quarter-wave conductor 5 are shorted in the microwave current. The fourth conductor 9 is made in the form of a grounding base, overlapping the half-wave conductor 1. The thickness h g of the second dielectric substrate 3 is greater than the thickness hj of the first dielectric substrate 2.
The balancing device operates as follows.
The microwave signal arriving at the asymmetrical input formed by the beginnings of 10–12 half-wave 1, first 4 quarter-wave and fourth 9 conductors is fed to the symmetric output formed by the end 6 of the first quarter-wave conductor 4 and the beginning 7 of the second quarter-wave conductor 5. By selecting the parameters of the second dielectric substrate (dielectric constant S and thickness h) ensures the equality of the phase velocities of even and odd waves
connected lines formed by half-wave conductor 1 and quarter-wave conductors 4 and 5. This provides the required output parameters in a wide frequency band. To meet these conditions, it is necessary to choose the thickness h of the second dielectric substrate 3 to be larger than the thickness of the first dielectric substrate 2.
At the same time, making the fourth conductor 9 in the form of a grounding base overlapping the half-wave conductor 1 provides an increase in the degree of integration, since it allows the dielectric substrate 2 to be placed on a conductive plane.
The balancing device can be manufactured using either hybrid or monolithic technology, for example, on a GaAs semi-insulating substrate, which is the second dielectric substrate 3. It is advisable to use a dielectric film, for example, SijN, as the first dielectric substrate 2.
权利要求:
Claims (1)
[1]
Invention Formula
.. A balancing device containing a half-wave conductor open at the end and located between two dielectric substrates, on the outside of the first of which there are two quarter-wave conductors located along the axis of the half-wave conductor, with the end of the first and the beginning of the second separated by a gap opposite the middle part of the half-wave conductor, and on the outside of the second dielectric substrate is the fourth conductor, with the beginning of the half-wave conductor, the first the quarter-wave conductor and the fourth conductor are the unbalanced input, and the end of the first quarter-wave conductor and the beginning, the second quarter-wave conductor: are the symmetrical output and the beginning of the first quarter-wave conductor and the end of the second quarter-wave conductor are shorted over the microwave current, characterized in that, in order to improve integration, the fourth conductor is designed as a grounding base, overlapping
515107266
the half-wave conductor, and the thickness dividing them, is greater than the thickness of the first second second dielectric substrate, the dielectric substrate.
fic.2
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同族专利:
公开号 | 公开日
PL245000A1|1985-07-02|
CS929284A2|1991-02-12|
PL141094B1|1987-06-30|
US4755775A|1988-07-05|
HU192180B|1987-05-28|
EP0146086A2|1985-06-26|
HUT37691A|1986-01-23|
EP0146086A3|1987-08-26|
JPS6121601A|1986-01-30|
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法律状态:
优先权:
申请号 | 申请日 | 专利标题
PL1983245000A|PL141094B1|1983-12-09|1983-12-09|Microwave balun transformer,especially for mixers and modulators|
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